It worked faster than fresh fruits. Frozen blueberries are some of the quickest fruits to dehydrate. It is very important to remember though that there are fruits that should not be dehydrated. Avocadoes are some of them. Just be careful and make sure that fruits you want to dehydrate are in fact can be dehydrated. Frozen pineapple can be dehydrated. You have two options: you can thaw it first or dehydrate it right away. Make sure that the slices have equal size.
Place the slices on the mesh trays in single layer. Make sure that they are not overlapping before placing them in the dehydrator. Dehydrate the pineapple slices at degrees Fahrenheit until they get leathery and dry. For smaller slices, the dehydrating process will take hours. Thicker and bigger slices will take longer about hours. Once dehydrated, let them cool completely then store them in an airtight container.
Place the container in a cool and dry area of your house. If done correctly, dehydrated frozen fruits can last for 1 year or so. You can dehydrate frozen apple slices. Assuming the slices have equal size, place them on the dehydrator trays in a single layer.
This is known as 'case hardening' which prevents the inside of the fruit from drying properly. Fresh lemons, limes, and oranges can be washed and sliced and put on your food dehydrator with no further preparation necessary!
See the dehydrating fruit clickable pictures at the top of this page for each specific fruit. All frozen fruits can be placed on your dehydrator trays with no further preparation — how easy is that? Before opening your bag of frozen fruit, throw it down onto your counter top not too hard! If you still have a few small clumps on your dehydrator tray, run it under cold water for a few seconds and that will take care of it! Certain fruits like bananas, apples, and strawberries, need to have a generous spraying of lemon juice.
Lemon juice is a totally acceptable substitute for ascorbic acid which is used by professional dehydrating plants, and the lemon juice works wonderfully! Two reasons for spraying with lemon juice is to prevent the fruits from darkening and to prevent bacterial growth during drying. Dehydrated fruits such as oranges, lemons, and limes get really dry, almost brittle.
Consider this a gentle reminder to use frozen cherries, strawberries and other fruits with few seeds to make nutritious smoothies. Blueberries, currants, plus peaches and all their kin will work. If you have bits of kale or spinach in your winter garden, you can add them to the blender, too. With seedy blackberries and raspberries, I prefer to remove the seeds and enjoy the tart juice, which makes a delicious addition to herb teas.
The procedure is simple: Place a quart liter of frozen raspberries or blackberries in a heavy saucepan.
Add one-half cup ml water, and bring to a simmer over medium heat. Mash the hot berries with a potato masher or large spoon. When the mixture is steaming hot, remove from the heat and allow to cool. Pour through a strainer to remove the seeds — an unexpected treat for backyard birds. The process of freezing and thawing breaks down the cell walls in frozen strawberries and cherries, which is a good thing if you want to dry some of your frozen berries to enjoy as chewy, nutritious snacks.
You can dry frozen strawberry or cherry halves straight up, but I have found that tossing the cut fruit with a coating of sugar, and allowing the mixture to sit in the fridge for a day before putting the fruit in the dehydrator, vastly improves the overall quality of the dried fruit.
Frozen blueberries and currants dehydrate faster and better than fresh ones, but expect these berries to be quite tart and slightly seedy when dried.
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