Preheat your oven to 350. Prep your baking dish for nonstick
Start by preparing your topping. Mix together the flour, brown sugar alternative and cinnamon in a bowl. Then cut or work in the butter chunks. When you get lumpy chunks, you can set this aside.
In another large bowl, mix together the sugar alternative, flour, and cinnamon. Then toss your apple slices in this bowl.
Transfer the contents from the bowl to the prepped baking dish, spreading the mixture out evenly.Cover the apple mixture as evenly as possible with the topping from the first bowl.
Bake this for 40-45 minutes. The topping should start to brown.