2 deep-dish prepared pie crusts (optional) 2 (15.5 ounce) cans navy beans, rinsed and drained 1 (12 fluid ounce) can evaporated milk 1/2 cup butter, melted 1 teaspoon ground cinnamon 1 teaspoon grated nutmeg 2 tablespoons all-purpose flour 2 1/2 cups white sugar 2 tablespoons vanilla extract 4 eggs bake 450 for 15 minutes, reduce to 350 and bake 35 minutes