Unwrap pie dough disks, and transfer to a lightly floured work surface. Roll dough to about 1/4-inch thickness. Cut 10 (6-inch) dough rounds, rerolling scraps as needed.

Cut a 1/4-inch-round hole in top of each pie. Brush pies lightly with remaining beaten egg. Bake in preheated oven until golden brown, 32 to 38 minutes. Transfer pies to a wire rack; let cool 10 ...