Preheat oven to 350 degrees and butter your baking dish.
Wash, peel, core, and slice apples. Toss and coat with flour, sugar, melted butter, and lemon juice. Pour into the prepared pan.
In a separate bowl, cut together all of the ingredients for the topping. Finish off by mixing with your hands for 1-2 minutes or until it comes together.
Top the apple filling evenly with the crisp topping.
Bake 35-45 minutes or until the apples are soft. Serve warm with ice cream or whipped cream.