- Cover a baking pan with a piece of parchment paper.
- Peel, core and cut apple into thin slices.
- Place apple slices on parchment in a single layer.
- Sprinkle with sugar and cinnamon. Bake in a 200F oven for 1 hour.
- After an hour, loosen the apple slices from the parchment paper so that they don't stick.
- Return to the oven and bake for another hour or so, until the apple slices have started to curl.