Preheat oven to 350F. Add almond flour, arrowroot powder and salt to a food processor and pulse a few times to mix. Add eggs, vanilla and butter and process until well combined. Roll dough into a ball and place in the center of a 9 inch pie pan. Using your palms and fingertips, spread the dough outward toward the edges of the pan. If desired, crimp the crust using the technique demonstrated in the video above. Bake for 12 minutes, then remove and allow to cool while you work on the filling.