Servings: Serves 8 or 9
To make dough: Place flour, salt, and sugar in the bowl of a mixer fitted with a paddle attachment; combine on low speed. Cut butter into small cubes; add to bowl. Mix on low until butter resembles pea-size balls; then, while mixer is running, add 1/4 cup very cold water, 1 tablespoon at a time. Mix until ingredients just come together. If dough won't quite combine, add an extra tablespoon water.
Divide dough in half. Shape each piece into a flat, round disk. Roll each between 2 pieces of parchment or waxed paper until dough is 1/8-inch thick. Chill (in paper), lying flat, for at least 1 hour before using.
To make filling: Place cherries in a bowl. Toss with tapioca, sugar, and salt; let sit for 15 minutes.
Preheat oven to 425°. Remove dough from refrigerator and place on a countertop. Remove top piece of parchment from 1 sheet, and lay it dough side down in a 9-inch pie pan. Pull the other piece of paper off, and let dough sit for a few minutes to soften. When it has become pliable, gently press it into pan. Trim edges, but leave a 1/2-inch overhang.
Work with other dough sheet to prepare lattice top. Peel off top piece of paper and immediately place it back on dough. Flip dough over; remove and discard the other piece of paper. Cut dough into 1/2-inch strips.
Pour filling into pie shell. Lay half of dough strips evenly across the top, keeping a 1/4- to 1/2-inch gap between strips. Form a lattice by weaving the remaining strips perpendicular to the first layer (again keeping a 1/4- to 1/2-inch gap between strips).
Trim excess dough around rim so edges of lattice match up with the ½-inch overhang of bottom crust. Dust your fingers with flour, then pinch top and bottom layers of dough together to form a ridged crust. Continue crimping dough around entire pie shell, flouring your fingers as needed.
Place pie pan on a baking sheet, and set it on a rack in bottom third of oven. Bake for 10 minutes. Meanwhile, beat egg in a bowl. Pull pie out of oven and brush egg on crust. Return to oven and lower heat to 350°; bake for 45 minutes or until crust is golden brown and fruit is bubbling and thickened. Remove from oven. Allow to cool at least 1 hour before serving.
From the June 2009 issue of O, The Oprah Magazine
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