When dehydrating foods, first you have to think about how you are going to use the items in the end. For example the onions. If you are going to use them in soups or stews, do you want a diced or sliced onion? For bananas, are you going to eat them out of hand or use them for baking banana breads or making puddings? Now mushrooms are simply mushrooms, they are best sliced in and on anything in my opinion! lol
Now that you have decided on how you will begin prepping them, it is time to think about getting your products for the best price. Mushrooms are now mostly cultivated year round, but if you watch at your local grocery store they do put them on sale or mark down frequently because they are very perishable, unlike onions, and very much like bananas.
For bananas, I like to soak them in a mix of 1/4 cup of lemon juice(frozen concentrated mixed lemonade works well also) to 1 gallon of cold water, even a nice lemon vineagrette is a wonderful treat to nibble on. You can break this recipe down to the amount of bananas you are drying at one time. I do the same with my mushrooms, although I like to also add a handful of minced fresh thyme to the mix, makes them quite tasty when rehydrating them for cooking or on pizzas. Or using a nice vineagrette on these before drying is also nice.
For onions, I just cut the way I want them and start drying them. I also dry shallots, chives, leeks, garlic in the same way on the same trays. Gives everything such a nice flavor and I mix some into dips, into a bowl of popped corn or potato chips. We love the kick it gives the bland nibbles.
Do remember these tips:
Lightly spray your trays with a vegetable spray, clean up is so much easier.
The items you dip or process in lemon juice(ar any juice)will always be darker than the items you see packaged in the stores. Also to rehydrate the ratio of product to liquid is 1:1. And it can take from a few minutes to overnight to rehydrate some dried products.
I put my dried products into cleaned out peanut butter jars with lids, and glass jars. I always keep my mushrooms in glass canning jars, just a personal preference. I do not store all my stash in one container just in case there is some moisture left in one or two pieces, I dont lose the whole batch.
Give yourself at least 24 hours for each fill of your dehydrator, dont push it. It can get very overwhelming to see all that product sitting there needing to be sliced, diced or chopped. And this way you know your first batch is dried enough and cooled enough for proper and long term storage.
Brianschef Michelle