Southern Sweet Potato Pie
4 tablespoons (½ stick) butter½ teaspoon salt¾ cup sugar3 egg yolksJuice of 1 lemon (about 3 tablespoons)2 teaspoons grated lemon rind¼ teaspoon ground cinnamon¼ teaspoon ground nutmeg¼ teaspoon ground allspice2 cups mashed sweet potatoes1 cup whole milk, scalded3 egg whites, stiffly beaten1 (9-inch) pie shell, unbaked Heat the oven to 425°. Blend butter, salt, and…