Sustainability

Simple tips for leftover Christmas menu items

Kira Zabe

December 25, 2021

Did you once again go overboard with the lavish Christmas menu and there's a lot left over from everything? Moreover, one is often invited to friends and relatives, and the possibility of eating everything promptly is increasingly out of sight. Unfortunately, this leads to food being thrown away too soon or stored improperly. As a result, food waste increases unintentionally.

With this article, we want to provide you with guidance on the best ways to store leftovers and how long they can be safely enjoyed while still tasting as good as when freshly cooked.

Store properly in sealable boxes

Store leftovers properly

Proper storage can positively affect shelf life. Thus, airtight containers or jars with screw tops are the right choice. Open bowls should be covered with sustainable beeswax wraps. Cooking pots must not be placed in the refrigerator immediately, as a field of warmth can be maintained in the center of the pot's interior. This is an ideal breeding ground for bacteria.

Storage - timing is everything!

The timing of when food is placed in the refrigerator also plays a crucial role in terms of shelf life. Ideally, dishes should be placed in the refrigerator right after cooling down or at most two hours later. The reason is that room temperature promotes bacterial growth. If you don't have the option to put everything away immediately, a better choice is to first place everything in sealed pots on the balcony or terrace. This is a good substitute for a refrigerator.

Reheat food leftovers, but do it correctly!

Prepared foods should be reheated no more than once and at a minimum of 70° Celsius. This ensures that most bacteria are killed. Do you have so much leftovers that it's enough for several meals? Then the food should be portioned into boxes or jars right after the meal. If you plan to use the leftovers the very next day, then keep them in the refrigerator. Put the remaining containers straight into the freezer.

With these tips, the already cooked dishes can be stored in the refrigerator for three to four days. However, make sure to check beforehand if everything is still as it was. If the food has taken on a different smell or looks strange, it is better not to consume it.

Mushrooms, poultry, and the like: How long these food items stay fresh

What was that again about grandma's rule of thumb? Can I do the same with mushrooms? Was the food really put into the fridge immediately after cooling down? These are the most common questions that arise when preparing meals again.

Meat

When preparing meat, make sure to cook it thoroughly. This is important to prevent the formation of bacteria when reheating. The best way to achieve this is to ensure the core temperature reaches 80°C and the meat is no longer pink inside. It is very important to store it in a cool place afterwards. This way, steak, chicken, etc., can be kept in the refrigerator for up to 3 days. Prefer using a pan when reheating meat. Reheating in a microwave often leads to unevenly heated food. In this case, so-called 'cold spots' can form, where salmonella can survive very well.

Fish and seafood

Lobster or shrimp are popular delicacies often served at Christmas. It is particularly important to refrigerate them immediately after they cool down. Then, fish and the like can be kept for up to two days. However, with shrimp, it should be remembered that they can lose their juicy texture and the taste may also suffer as a result. Surprisingly, cooked fish remains edible for three to four days with proper refrigeration.

Side dishes

Starchy side dishes such as potatoes, pasta, and rice are very susceptible to a specific type of bacteria that forms spores. These heat-resistant spores cannot be properly killed off even when reheated a second time. Therefore, careful consideration should be given before using the side dishes for a second meal.

Shelf life of pasta and the like.
cooked pasta up to 3-4 days
cooked rice, a maximum of two days
fried or boiled potatoes last about 2-3 days

The advantage of side dishes is that they retain their nutrients well during cooling and taste as good as on the first day of preparation even after several days stored in the refrigerator.

Mushrooms

It is commonly believed from past times that mushrooms, chanterelles, and the like spoil much more easily than other foods. However, this is not correct. If the mushrooms are well cooked during preparation and reheated properly before being eaten again, they can be reheated once more without issue. Nevertheless, it should be noted that mushrooms should not be stored in the refrigerator for more than a day. Otherwise, toxic bacteria can develop. This is due to their high water content. As a precaution, mushrooms should be discarded if they smell bad or have discolored.

The following overview may be helpful:
1. Allow mushroom dishes to cool down quickly after preparation.
2. Store in the refrigerator at 2 °C to 4 °C (lower glass shelf).
3. When reheating, ensure a minimum temperature of 70 degrees and heat everything thoroughly.

Spinach

Prepared spinach should be sealed airtight and refrigerated as soon as possible. Spinach contains the harmless plant nutrient nitrate. However, if bacteria form, this converts into the harmful nitrite. If your refrigerator is well adjusted to the stored food, this rarely happens. Nevertheless, prepared spinach should be included in your meal planning no later than two days after.

Salads

It is possible to keep salads and leafy greens for several days without any problems. However, this reduces their quality. Celery, beetroot, or Swiss chard contain nitrate, which can turn into toxic nitrite, just like with spinach. Therefore, it should not be left at room temperature for an extended period. Whether raw or cooked, make sure to cool it as quickly as possible or incorporate it into the next dish.

Eggs

The most delicate food is probably the egg. Whether scrambled or fried eggs, or boiled eggs, they should not be reheated a second time and should also not be stored in the refrigerator. Always try to prepare only as much as necessary with eggs and, if needed, take more and prepare it fresh.

When reheating prepared food, care should be taken to ensure that leftovers are thoroughly heated to at least 70 degrees Celsius for two minutes.

Spread made from leftovers for the Christmas brunch

Recipe ideas from the Christmas menu

Spread:
Are you planning a Christmas brunch or do you love spreads just as much as I do? Can you prepare a delicious spread. For this, let leftover cooked legumes simmer for about two to five minutes. Add cooked vegetables and onions with some butter or vegetable fat and sauté it with the legume mash, stirring constantly. Let it simmer for five to ten minutes and season it to taste.

Ragout:
Do you have any leftover meat from yesterday's goose or duck? Then you can cook a delicious ragout with the sauce, chestnuts, and mushrooms.

Stew:
If only the bones (carcass) are left, you can make a broth by starting with cold water. Now just add any remaining vegetables, soup noodles, or croutons, and your leftover stew is ready.

Vegetable broth:
Do you have leftovers from herbs, peels, and vegetable side dishes? Then you can cook a vegetable broth with water, salt, garlic, and a few peppercorns. This can serve as a base for other dishes.

Potato cakes:
Do you have leftover mashed potatoes? You can create a savory batter by mixing it with some flour, egg yolks, and chives. Fry this batter in a pan and you'll get delicious potato cakes.

Casserole:‌‌
A hearty casserole can be prepared from leftover raclette. Sauté the potatoes with onions and bacon in oil, add the pickled vegetables, Crème fraîche and mix everything well. Now transfer everything into a casserole dish and garnish with the remaining raclette cheese. Place the dish in the oven and bake until the cheese reaches the desired golden brown color.

Farewell to Stollen:
If there's too much Christmas stollen left over and it has become dry, you can revive it by drizzling some butter and a cup of warm milk over it, giving it a new zest for the next round.

Inspiration for the next big celebration or Christmas 2022

"Meal-Prepping" is a popular practice for many who want to eat healthily and diversely during the week. It also eliminates the daily dilemma of deciding what to cook, as the basics are already prepared on Sunday or just need to be thawed on individual days. Meal-Prepping works wonderfully for holidays or Christmas too. Initially, one only needs to consider what the basic components will be and then decide which dishes can be created from them. This allows for a variety of delights over several days and greatly reduces the likelihood of having too many leftovers.
Another positive effect is that it reduces stress in the kitchen since there is less to prepare, and fewer different ingredients need to be purchased, which can shorten the time spent in the supermarket. This is a significant contribution to fostering more contemplation during the hectic Christmas season. In our research, we were inspired by "Zu gut für die Tonne". We have listed the menu suggestion here so that you can see for yourself how simple Meal-Prepping can be at Christmas.

What is important in Meal-Prepping? The main component is vegetables. Whether fried, boiled, or raw – vegetables offer great flexibility and are always tasty. Opt for varieties like carrots, onions, beetroot, pumpkin, as well as winter cabbage and turnips, to be seasonal, regional, and diverse.

Potatoes, rice, pasta, couscous, or bulgur are starchy foods that are filling. When uncooked and stored properly, they all keep for several months, except for the potato.

Meat, fish, legumes, eggs, curd, or yogurt are sources of protein that should not be missing in any dish. However, it is important to note that fresh fish, minced meat, or poultry should also be consumed within two days of purchase at the latest, well chilled. With pork and beef, you can plan up to three days in advance.

Even on holidays, the right storage options are crucial for meal prepping. Because what good is the best-prepared menu if it can't be stored properly. Holiday feast a la Meal-Prep

Here is a classic suggestion for the possible menu:
Christmas Eve: Roast goose with red cabbage and mashed potatoes
First Day of Christmas: Roast ragout with red cabbage and walnut salad, potato pancakes, and ratatouille


Boxing Day: Leftover Quiche

If you want to add more variety to your meals, you can use a range of vegetables such as onions, carrots, zucchini, eggplants, bell peppers, and mushrooms multiple times in addition to red cabbage and potatoes.Christmas Eve

On Christmas Eve, the traditional roast goose is served. Red cabbage and mashed potatoes are the suitable side dishes that come to the table. Both can be wonderfully prepared in advance and can be stored frozen for several weeks. The red cabbage can be cooked with some old apples, onions, and goose fat. After cooling, fill it into an airtight container and store in the freezer. If space in the freezer is limited, the precooked red cabbage can also be kept for a few days in the refrigerator if sealed airtight. Who would have thought that mashed potatoes can also be frozen and stored without losing flavor? Thaw it on Christmas Eve and the mashed potatoes are ready with little effort. The roast goose can also be well prepared in advance. Thus, after purchasing, the roast can be prepared right away. Once it is frozen, it is sufficient to thaw it in the refrigerator on the eve and warm it up in a well-tempered oven on Christmas Eve. However, do not forget to check it regularly.

Christmas Day
The remnants of the generously calculated Christmas feast celebrate their revival on the first day of Christmas. Thus, a ragout can be cooked from the leftover goose, onions, and apples. To the red cabbage with apples from Christmas Eve, a few walnuts and a dressing made of vinegar and oil are added to create a crisp salad. Leftovers from the mashed potatoes are mixed with eggs, remaining flour, and spices, and fried in a pan to make potato pancakes.

Boxing Day
On Boxing Day, it's time to tackle the leftovers. A delicious leftover quiche can be conjured up. Everything goes in, whether it's roast leftovers, vegetables, ratatouille, or surplus eggs and flour – everything is used here.

Ready, set, go with the containers. Now you should be prepared for the perfect storage of your Christmas menu leftovers. Moreover, you now have an idea of how meal prepping can work with the festive menu. Let us know what you all had to eat for Christmas and how you dealt with the leftovers. We're excited to hear from you! Feel free to write to us at info@speisekammer.app

New laws on food waste in Spain

Spain has recently passed a groundbreaking law to combat food waste. This law requires all actors in the food chain, from producers to retailers, to implement specific plans to prevent food loss.

Key provisions of the law:

Obligation to donate surplus food: Supermarkets with a floor space of more than 1,300 square meters are now required to form partnerships with non-profit organizations to donate surplus food that is still fit for consumption. These donations are exempt from value-added tax.

Offer of packaging for leftover food: Restaurants and bars are required to provide their guests with free, reusable or recyclable packaging so that they can take home uneaten food. The aim is to raise consumer awareness of food waste and encourage them to take leftovers with them.

Promotion of the sale of products with approaching expiration dates: Retailers should offer products that are nearing their expiration date or have aesthetic defects at reduced prices to encourage their sale and reduce waste.

Hierarchy of priorities for dealing with surplus food: The law establishes an order for handling surplus food. Priority is given to human consumption through donations. If this is not possible, the food should be used for the production of processed products. The last options include using it as animal feed or for energy generation.

Sanctions for violations:

Companies that violate the provisions of the law can expect fines ranging from 2,000 to 500,000 euros.

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Critique and Outlook:

While the law is considered an important step in the fight against food waste in Europe, there is also criticism. Some voices argue that the strict framework of sanctions could disproportionately burden companies and that the law does not sufficiently address the role of consumers, who are responsible for a significant portion of food waste.

Nevertheless, the law is seen as a significant advancement in reducing food waste and promoting a more sustainable awareness in society.

Join in and reduce food waste! 🌱📲

Spain's new law demonstrates: Sustainability starts in the pantry! With the Speisekammer App you can keep track of your groceries, plan meals efficiently, and avoid unnecessary waste.

👉 Download the app now and join the movement for less waste and more conscious consumption! 💚 Try it now!

August 27, 2025
2 min read

Get the most out of your Smantry App: Activate these premium features!

🖼️ Private photos for your articles

Make your inventory management visual! With the feature "Upload Your Own Images" you can add a photo to each item – for example, of the packaging, the jar, or the portion in the freezer. This is especially helpful if you share with others in a community or if you want to visually remember your supplies better.

Activation: Open app → Account (last tab in the mobile app) → Settings"Activate Personal Pictures"

🔍 Target nutritional information

The app automatically displays calorie and nutritional information – super convenient when you're shopping or eating mindfully. Don't need this info right now or want a cleaner view? You can also simply hide the display!

Control:Profile → Account SettingsEnable “Hide Nutritional Information”, to hide it.

💶 Prices & Expenses at a Glance

If you want to know how much you spend on which item or how much money is lying dormant in your pantry, the Price Entry feature can help you. With it, you can plan your shopping even better and even track your budget.

Activation: Open app → Account (last tab in the mobile app) → Settings“Enable price input”

💡 Prepper Mode: Even More Control

The Prepper Mode has been introduced for those who really want to keep track of everything – including minimum quantities, emergency supplies, and individual notes for serious situations. It's also useful if you just want to make sure you never run out of anything important.

Activation: Open app → Account (last tab in the mobile app) → Settings“Show Prepper Information”

Here's how you can find your account settings

In the mobile app you can find the settings easily in the last tab on the far right (Account). In the web app click on Account → "Settings".

All mentioned features are part of the Premium-Version. If you don't have a premium license yet, feel free to check in the app or on app.speisekammer.app/upgrade – there's also a family license available!

Conclusion: You have more options than you think. Activate the hidden premium features now and get the most out of your Smantry app. Because smart inventory management starts with the right tools.

If you have any questions about activation, feel free to contact support or check out our Help Center. And if you have feature requests – we always welcome your feedback!

July 30, 2025
2 min read

Never forget leftovers again: Soon you'll be able to mark opened products 🧃✨

💡 The new feature: Mark products as "opened"

With the upcoming update, you will soon be able to specify in the Pantry App when a product was opened. This way, you always keep track:

  • What is already open
  • Since when it has been open

This is particularly useful for fresh or perishable food items, but also for sauces, canned goods, spreads, or snacks.

🔔 Reminders included

Of course, if you wish, you will also be automatically reminded, when an opened product should soon be consumed – all in keeping with the motto: Use rather than waste.

🎯 Why this is important

Food waste often doesn't occur while shopping – but at home, in everyday life. If we know better what is open and should be consumed, it becomes easier to make the right decisions. And that's exactly what the Pantry App wants to support you with even better with the new feature.

🛠 When will it be time?

We are currently working hard on the implementation – the feature is expected to be rolled out in the next update. So you will be able to test it very soon yourself.

If you want to participate in the testing or have feedback, feel free to write to us in support. We look forward to your ideas!

With the Pantry App, stockpiling becomes not only more sustainable, but also easier – step by step.

Stay tuned – it's getting exciting! 💚

July 25, 2025
1 min read

🌍 Small ideas – big impact: These companies help you save food in everyday life

🍏 Foodsi (Poland)

This mobile app connects users with restaurants, bakeries and cafés offering surplus food at reduced prices—especially valuable in Polish cities like Warsaw or Kraków.


🔗
foodsi.pl

🛍️ OLIO – Share Surplus Food with Neighbors

OLIO connects neighbors and local businesses to share surplus food instead of throwing it away. Users can offer or request free food via the app — reducing waste and building community.


🔗 https://olioapp.com

🍌 Imperfect Foods – Selling "Ugly" but Edible Food

This U.S.-based grocery delivery service rescues "imperfect" produce and surplus goods that major supermarkets reject due to appearance or overstocking — and delivers them directly to your door.

🔗 https://www.imperfectfoods.com

📦 Dispatch Goods – Reusable Packaging for Takeout

Dispatch Goods partners with restaurants to replace single-use containers with reusable packaging. This reduces packaging waste — and their system tracks and collects the containers for reuse.


🔗 https://www.dispatchgoods.com

🥬 Fresh.Land – Farm-to-Consumer to Prevent Waste (DK)

Fresh.Land shortens the supply chain by connecting consumers directly with farmers. This means fresher produce, longer shelf life, and fewer losses due to long storage or transport.


🔗 https://www.fresh.land

🧊 ColdHubs – Solar-Powered Cold Storage in Nigeria

ColdHubs installs solar-powered cold rooms for small farmers and markets to store perishable foods. This innovation significantly extends shelf life and reduces spoilage in hot climates.

🔗 https://www.coldhubs.com

🧃 Winnow – AI to Track Food Waste in Commercial Kitchens

Winnow’s smart scales and AI help restaurants and hotels measure and reduce food waste. By showing how much food is wasted and why, kitchens can adapt their behavior.

🔗 https://www.winnowsolutions.com

Why this matters for you

When you use the Smantry app, you can track and manage rescued food items in your pantry – whether they came from Foodsi, Karma, or another initiative. We’re building integrations to log these products, set reminders, and reduce waste in your household.

Know any other businesses doing this well?

We’d love to hear about them! Email your favourites to kira@mantry.com or write us in the chat or social media. Your tip might inspire others and be featured next. 🌿

July 24, 2025
2 min read