Preheat the oven to 350°F and line an 8×8 inch square pan with parchment paper.
In a large mixing bowl, mix the almond butter, maple syrup and vanilla extract together until combined.
Add in the oats, oat flour, almond flour, salt, cinnamon, and nutmeg and mix until everything comes together. Let the batter sit for 10 minutes to thicken.
While the batter sits, prepare the apple filling. In a large bowl combine the chopped apples, cinnamon, nutmeg and maple syrup and toss together until the apples are evenly coated.
Place half of the cookie crust in prepared pan, spreading the dough into an even layer all the way to the edge. Put the apple filling over the bottom layer and crumble the remaining half of the dough over the apple filling.
Bake for 40 minutes, or until the edges are golden brown.