Locally grown apples - preferrably from your own garden, if you have that option - dried to crisp yet chewy snacks. I borrowed a friend's dehydrator and that worked out really well, but you can oven-dry these as well. Or even air-dry, but they won't be as crispy.
You can dip the slices, pre-drying - in lemon juice to prevent browning, and you can add spices like cinnamon or cardamom. I did nothing at all to this batch though - the apples are delicious all on their own.