I used to have a dehydrator, but it was one of those gadgets I "had to have", then rarely ever used, so I eventually got rid of it. Last night, I decided I wanted to dehydrate some apples, and decided to experiment with using my oven. It worked beautifully and was so easy. I sliced the apples and popped them in before bed, and in the morning, I had a batch of perfect dried apples! Think I'll be experimenting with other fruits and veggies!
Preheat oven to lowest temp.-On my oven, this is 170F. (If your oven won't go lower than 200F, don't try this method. Any higher than 200F and this probably won't work well)
Add the lemon juice to the water in a shallow dish.
Core and slice apples into rings or slices. Slice about 1/8in. if you want thin apple "chips". Slice about 1/4in. for thicker chewier slices. This is definitely easier with a mandolin type slicer(I used the Pampered Chef simple slicer), or food processor, but a sharp knife and patience would work, too!
As you slice, place the apple slices into the water/lemon juice.
Place the apple slices, in a single layer on cooling racks that have been placed on baking trays*. (No need to drain or dry them, just shake off the excess liquid and put them right on the tray.) Pop in the oven and ignore for the next 7-8 hrs. (It is helpful to prop the oven door open a couple of inches while the apples are drying, to let moisture escape.)When apples have reached desired dryness, turn off the oven and leave for another 30-60 min. Remove, cool, and store in airtight container.
*You could do this without the cooling racks, but I think you would probably need to flip the apple slices half way through the drying time.