Three-Berry Pie

Put a large baking sheet in middle of oven and preheat oven to 450°F.

Whisk together granulated sugar, cornstarch, tapioca, and salt, then toss with berries.

Roll out 1 piece of dough (keep 2nd chilled) on a lightly floured surface with a lightly floured rolling pin into a 13-inch round and fit into pie tin. Trim edge- leave a ½-inch overhang. Chill shell while rolling out dough for top crust.

Roll out remaining piece of dough on lightly floured surface with floured rolling pin into an 11-inch round.

Spoon filling into shell, then cover pie with pastry round and trim with kitchen shears, leaving a ½-inch overhang. Press edges together, then crimp edge decoratively. Brush top of pie with egg and sprinkle all over with sanding sugar. Cut 3 steam vents in top crust with a small sharp knife.

Bake pie on hot baking sheet in middle of oven 15 minutes, then reduce oven temperature to 375°F and continue to bake until crust is golden brown and filling is bubbling- about 45 minutes more.

Cool pie on a rack at least 3 hours before serving to allow juices to thicken slightly (filling will still be juicy)