Combine wet filling ingredients together, then add in the dry. Combine well. Press 2/3 of the mixture into the bottom of an 8x8 pan lined with parchment paper. Bake at 350 for 5-6 minutes, then remove and set aside
Add an additional tbsp of coconut flour to the remaining mixture, giving it more of a crumble consistency. Refrigerate for now
Place apple slices, water, and lemon in a pot. Bring to a boil and stir. Once apples start to soften, remove from heat and add remaining filling ingredients
Pour filling overtop base layer, then crumble the top layer overtop. Bake an additional 25 minutes, until top starts to golden
Let cool completely. If eating as is they'll be pretty gooey and messy. I recommend refrigerating for an easier / cleaner cut, then warm prior to serving
Enjoy as is, or with ice cream and caramel drizzle on top!