This is only one of the simplest and best snacks / after dinner recipes. Cut the apple not in slices but in circles. Put foil on a baking sheet, and spread out the apple. Next, sprinkle cinnamon or cinnamon sugar on top (pending how sweet you want it). Stick in the oven and wait until it browns!
I usually just use cinnamon, especially if I am adding a scoop of ice cream with it for desert!