Preheat the oven to 350 degrees F.
In a high-speed blender, combine the dates, maple syrup, ground flax, and ½ cup chopped pecans. Blend on high until well-combined.
Transfer to a medium bowl and fold in the remaining pecans (leaving some aside to decorate the top).
Pour the filling onto the crust and top with remaining pecans to decorate.
Bake for 40-45 minutes. Remove from the oven and allow to cool for 5 minutes, then serve and enjoy!