Preheat oven to 350.
Grease a 6-cup muffin tin with cooking spray and set aside.
Using a round, 4-inch cookie cutter, make the tortilla cut outs.
Brush each tortilla with butter and generously sprinkle with cinnamon sugar; reserve butter and cinnamon-sugar
Carefully fit tortilla cut outs in prepared muffin tin.
Bake for 10 minutes.
In the meantime, prepare the apples.
Pour the remaining of the butter in a frying pan and place over medium-high heat.
In a medium-sized bowl combine the diced apples with the remaining cinnamon-sugar (use less if you don't like too much spice), and mix in the nutmeg.
Add the apple mixture to the frying pan and cook for about 10 minutes, or until tender, stirring frequently.
Remove tortilla shells from the oven and cool completely.