Step 1

Preheat oven to 400°. On a lightly floured surface, roll half the dough to 1/8-in.-thick circle; transfer to a 9-in. pie plate or cast-iron skillet. Trim even with rim. Arrange plums in crust. In a small bowl, combine sugar, flour, cinnamon, salt and nutmeg. Stir in egg, orange juice and zest. Pour over plums; dot with butter.

Step 2

Roll out remaining dough to a 1/8-in.-thick circle. Place over filling. Trim, seal and flute edge. Cut slits in top.

Step 3

Bake until crust is golden brown and filling is bubbly (cover edge with foil during the last 15 minutes if needed to prevent overbrowning), 45-50 minutes. Remove foil. Cool on a wire rack 10 minutes before cutting. If desired, serve warm with ice cream.