Apple Crisp

3-4 apples, peeled and sliced
1/2 c rolled oats
1/2 c brown sugar
1/4 c flour
1/2 tsp cinnamon
1/4 c butter

Preheat oven to 350 degrees. Grease a 9x9 or 8x8 baking dish. Put in sliced apples.
In a separate bowl mix oats, brown sugar, flour and cinnamon. Cut in butter until mixture is mostly even and crumbly. Sprinkle mixture on top of fruit and bake for 40 minutes.