Put the apples into a cold oven and then turn the heat on, as this allows for some low temperature dehydration. I then turn the oven off and wait for it to cool completely before taking the skins out for the same purpose. I do not have a dehydrator and this method is working for me, but I imagine you could use a dehydrator to get similar results.
See original recipe at www.thecleangourmet.com. —Amelia Lundy
Peel your apples and arrange the peels on a parchment-lined baking sheet and place in the oven. Turn oven on to 300 degrees Fahrenheit and bake for about 30-40 minutes, tossing once or twice. When the skins are mostly dry and crisp, turn the oven off and leave pan in there until oven cools down to ensure full dehydration.
Enjoy alone for snacking, steeped in hot water as a “tea” or as a crunchy topping on salad, oatmeal or whatever you can think of!