Preheat your oven to 200 F. Spray a baking sheet with non-stick cooking spray and set aside.
Using a sharp knife, thinly slice your apples cutting straight through the core. (They need to be cut thinly or it will take longer for the apples to bake.)
In a bowl toss together your nutmeg, sugar and cinnamon. Place your apple slices one at a time in with your sugar and spice blend and flip to coat both sides.
Place your apples on your prepared baking sheet. Bake at 200 F for 2 hours. Flip them over after the first hour. Cool and enjoy.