preheat oven to 425* grease a 2-quart baking dish

for topping place flour, rolled oats, sugar & butter in large bowl & mix well

for filling peel, core & slice apples, then layer them in prepared baking dish. sprinkle brown sugar & cinnamon over apple slices. then sprinkle topping mixture over top. bake until golden & apples have softened, 20-25 minutes