It is easy! Simply chop up your apples, either into chunks or slices. Peeling is strictly a matter of preference. Toss your apples with a little lemon juice to prevent browning and then sugar to keep them sweet while baking. Transfer them to a baking dish. Mix together the oat topping using your flour of choice, gluten free or not, and then dollop onto the apples. You can use almond extract instead of vanilla if you prefer. You can even get crazy and use both! Melt butter and pour it over the crisp topping and apples. Bake and you are ready to eat!