Easy Apple Crisp

Preheat oven to 350 degrees. Peel, core and slice apples into thin slices. Cream together butter and sugar. Add oatmeal. Place apples in a baking dish and spread the topping over the apples. Bake for 30-40 minutes, or until top is brown and bubbly. Serve warm. Vanilla ice cream is great with this, but plain is good, too.