Preheat oven to 350. Spray a 9 x 13 inch casserole dish with nonstick spray and set aside.
For the Filling
Combine all ingredients in a large bowl and toss to coat the apples in the sugar, cinnamon, and flour. Pour into the prepared pan. Set aside
For the Topping
In a large bowl (this can be the same bowl used for the apples) combine all ingredients. Using your hands, gently rub the ingredients together to make fine crumbs. Pour on top of the apples.
Bake for 30 to 40 minutes until apples are soft and topping is golden. Let cool slightly before serving. Enjoy!