Preheat oven to 350 degrees.
In a large mixing bowl combine sugar and cinnamon.
Add sliced apples into sugar/cinnamon mixture and toss until well-coated.
Pour coated apples into a medium sized baking dish (mine was 8 x 11 inches and roughly 2-1/2 inches deep).
In a separate bowl, combine brown sugar, oats, flour and melted butter until crumbly.
Spread the crumble evenly over apples (try not to eat the topping).
Bake at 350 for 30 minutes until bubbly and golden. Serves 6-8. Enjoy.