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This is good information to have if you, like me, tend to try to cook more in the winter than in the heat of the summer months. I have ordered a lot of freeze dried foods over the years and some of them are easily rehydrated but I had some dried apples from Nuts.com and those things stayed just like saddle leather no matter what I did.
I can remember when I was growing up in the 1950's my mom and gramma's both used to make dried apple pies and that was what I was going for but I cannot seem to find the right reconstitution method. Any suggestions would be welcomed, otherwise I going to throw those damned things away (and they weren't cheap). I like to make fried apples n' onions as a side dish for many meals but I hafta be able to find the apples to use first. I don't use fresh apples because they don't work well for that dish. I think they are too juicy or something. I have my own dehydrator but the apples have to be sliced so thin that there's almost nothing left when they get done drying so that's not a good plan either. Sheesh, there's just no easy answers to anything these days no matter how simple it sounds.
I did find this information at a link online and there is some good information there about several fruits and veggies.
I do not make FREEZE dried foods mostly because my freezers are all full to the brim and my refrigerator freezer is so full I can barely get the dang door closed. I stock up when there are good sales on things at the farmers markets and my local health food stores. I don't get to those places very often so I buy lots and then scratch my head about where to put them when I get home. Last month I ended up buying 2 styrofoam coolers and 3 bags of ice and storing things that way until I could get some room organized in my freezers. I have some meat in my big upright freezer that needs to be thrown out anyway, so I'll be doing that the next time we are close to garbage hauling day! If there's one thing I cannot stand it's freezer burned meat. Ewwww.
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Also I have discovered, the hard way, that there are differences in drying fruits and drying vegetables. For me the easiest way was to dry them in my oven at 140 degrees (can do this year round because it doesn't heat the house up all that much, hardly at all, in fact).
BUT, as I said, keep in mind there are subtle differences between drying fruits and drying veggies.