Preparation Preheat oven to 400°F. Roll out each pastry sheet on lightly floured surface to 12-inch square. Stack squares and roll to 15-inch square. Using 14-inch pizza pan as guide, cut stacked dough into 14-inch round. Crimp edge of dough to form 1/4-inch rim. Transfer to pizza pan or baking sheet. Freeze 10 minutes. Melt butter in heavy large skillet over medium heat. Add leeks and 1/4 cup water; cook until leeks are tender, about 15 minutes. Season leeks with salt; set aside to cool. Bring cream to simmer in medium saucepan over medium heat. Reduce heat to low; add Camembert and stir until melted. Remove from heat and cool 5 minutes. Whisk in egg, cayenne, and nutmeg. Set custard aside. Sprinkle Parmesan over crust. Spread leeks over. Drizzle custard over. Bake until bottom is golden, about 20 minutes. Transfer to rack; cool 10 minutes. Serve warm or at room temperature.
Preparation Preheat oven to 400°F. Roll out each pastry sheet on lightly floured surface to 12-inch square. Stack squares and roll to 15-inch square. Using 14-inch pizza pan as guide, cut stacked dough into 14-inch round. Crimp edge of dough to form 1/4-inch rim. Transfer to pizza pan or baking sheet. Freeze 10 minutes. Melt butter in heavy large skillet over medium heat. Add leeks and 1/4 cup water; cook until leeks are tender, about 15 minutes. Season leeks with salt; set aside to cool. Bring cream to simmer in medium saucepan over medium heat. Reduce heat to low; add Camembert and stir until melted. Remove from heat and cool 5 minutes. Whisk in egg, cayenne, and nutmeg. Set custard aside. Sprinkle Parmesan over crust. Spread leeks over. Drizzle custard over. Bake until bottom is golden, about 20 minutes. Transfer to rack; cool 10 minutes. Serve warm or at room temperature.