Preheat oven to 350° F.
Peel the apples and cut into 1/2 inch cubes
Place the apples in a large bowl. Sprinkle with granulated sugar, flour, cinnamon and lemon juice. Stir until incorporated.
In a separate bowl, combine oats, flour, brown sugar, baking powder, granola, cinnamon, and melted butter. Mix thoroughly until clumps form.
Place the apples in an 8.5 x 11 baking dish. Top with the crumble mixture and spread until it evenly coats the apples.
Bake for 35 to 40 minutes or until golden brown.
Serve warm with vanilla ice cream and warm drizzled caramel sauce.