How to Use Your Dehydrator to Reduce Food Waste And Create More Usable Products

Between big Christmas meals, buffets and busy service, a lot of good food risks going in the bin. A food dehydrator is one of the most powerful tools you can use to reduce food waste, save money and create value-added products from leftovers.
In this guide, we’ll show you how to turn:
- Leftover christmas vegetables into stock powders and soup bases
- Extra herbs and aromatics into seasoning blends
- Surplus fruit into snacks, toppers and mix-ins
1. Turn leftover vegetables into instant stock mix
Instead of throwing away cooked vegetables after a big feast or service, you can turn them into a flavour-packed stock powder.
What works well
- Carrot
- Celery
- Onion & leek
- Mushroom
- Parsnip
- Pumpkin or sweet potato
Basic method
- Spread leftover cooked vegetables in a thin, even layer on dehydrator trays
- Dehydrate until completely dry and brittle – no moisture remaining
- Cool, then blend into a fine powder
- Store in airtight jars or pouches, labelled with date and usage
Use 1–2 teaspoons per cup of water as a base for:
- Soups and stews
- Gravy and sauces
- Savoury rice or grain dishes
Dehydrated All-in-One Vegetable Stock Powder
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2. Herbs & aromatics: from leftovers to seasoning blends
Fresh herbs are often bought in bunches and only partially used. After Christmas or a busy service, you might have:
- Half-used bunches of parsley, thyme, rosemary, sage or basil
- Extra garlic, onion or chilli
- Herb stems that still have plenty of flavour!!
Your dehydrator lets you rescue all of that.
How to make herb and seasoning blends
- Spread clean, dry herbs and sliced aromatics on trays
- Dehydrate until crisp and fully dry
- Crush or grind into flakes or powder
- Combine into blends such as:
- Roast vegetable seasoning
- All-purpose herb sprinkle
- BBQ rubs
- Herb salt or garlic salt
- Roast vegetable seasoning



















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