Ingredients 1 store-bought or homemade pie crust 2 large egg whites 1 large egg 1 cup maple-flavored syrup or pure maple syrup 1/2 cup firmly packed light brown sugar 2 tablespoons all-purpose flour 1 tablespoon butter or margarine (melted) 1 1/2 teaspoons vanilla 1/2 cup chopped walnuts Makes 8 servings. Preparation time: 15 minutes. Cooking time: 55 minutes. Cooling time:…