• 2 cups sugar
• 3 tablespoons all-purpose flour
• 1/4 to 1/2 teaspoon ground nutmeg
• Pastry for double-crust pie
• 1/2 cup butter, cubed
• 2/3 cup white vinegar
• 1 quart hot water

Preheat oven to 450°. Whisk together sugar, flour and nutmeg; set aside. On a lightly floured surface, roll one-third of pie dough to a 1/8-in.-thick circle; cut into 2×1-in. strips. Layer a deep 12-in. enamel-coated cast-iron skillet or ovenproof casserole with half the strips; sprinkle with half the sugar mixture. Dot with half the butter. Repeat sugar and butter layers. Preheat oven to 450°. Whisk together sugar, flour and nutmeg; set aside. On a lightly floured surface, roll one-third of pie dough to a 1/8-in.-thick circle; cut into 2×1-in. strips. Layer a deep 12-in. enamel-coated cast-iron skillet or ovenproof casserole with half the strips; sprinkle with half the sugar mixture. Dot with half the butter. Repeat sugar and butter layers. Bake until crust is golden brown, about 1 hour. Cover edge loosely with foil during the last 15-20 minutes if needed to prevent overbrowning. Remove foil. Cool on a wire rack.