Preheat oven to 350 degrees.
Make your brown sugar substitute by using a sugar alternative like Pyure brand stevia/erythritol blend. Add maple syrup and mix well.
In a mixing bowl, combine all ingredients for the crust until well mixed. Press mix into the bottom of a 9" pie plate. Bake for 20 minutes. (It will still seem really soft, that's ok!)
In another mixing bowl, combine all of the ingredients for the filling and mix well.
When the pie crust is done, pour the filling into the pie plate, evenly over the crust.
Place pie in oven and back for 40-50 minutes or until a knife inserted near the center comes out clean.