Preheat oven to 200 degrees, then line a baking sheet with parchment paper.
Stir together the Cinnamon & Sugar in a small bowl, then sprinkle half of the mixture onto the baking sheet.
Cut up the apple slices as thin as possible.
Arrange the slices on the baking sheet. Sprinkle the remaining mixture on top.
Bake in oven for about 2 hours.