Apple Crisp Recipe Made Easy

I recieved this recipe from my sister Sandy, and just love it. It is so quick and easy to make. I hope you enjoy it as much as we do.
Ingredients
8 Granny Smith green apples, peel and slice into half moon pieces
1/2 cup of sugar
1 teaspoon ground cinnamon
3/4 cup flour
1/2 cup oatmeal
1/2 cup brown sugar
1/2 cup butter (stick)
Directions
Preheat oven to 350 degrees F. , bake for 45 minutes. In a 9x12 baking dish, coat with butter and fill with apples, sprinkle white sugar and cinnamon through out the layers. Place flour, brown sugar, and oatmeal in a bowl, cut the remaining butter into the flour, do not stir. Sprinkle the entire mixture over the top of the apples. Note: fill apples higher then dish as they will shrink.

Serve with vanilla ice cream or cool whip. Nummy.