Add Pecans and Filling: Add the pecans to the bottom of the pie crust in a single layer. Whisk together the maple syrup, brown sugar, eggs, melted butter, vanilla, salt, and cinnamon in a large bowl and then pour it evenly over the nuts. Add a few additional pecans on top for decoration.
3 cups pecans, ¾ cup pure maple syrup, 1 cup brown sugar, 3 large eggs, 5 Tbsp. butter, 1 tsp. vanilla, ¼ tsp. salt, 1 tsp. cinnamon