Preheat oven to 400 degrees, with rack in lowest position. On a floured piece of parchment paper, roll one disk of dough to a 14-inch round. Wrap dough around rolling pin; unroll over a 9-inch pie plate. Gently fit into bottom and sides of plate (do not stretch dough). Using kitchen shears, trim dough to a 1-inch overhand all around. In a large bowl, combine cherries, granulated sugar, cornstarch, and lemon juice; toss until cherries are coated. Pour into prepared bottom crust.
On a floured piece of parchment paper, roll second disk of dough to a 14-inch round. Cut into eight 1 1/2-inch-wide strips; discard the shortest two. Weave strips over filling to form a lattice (see photo, page 28). Using kitchen shears, trim strips so they hang over rim by 1 inch. Tuck strips under rim of bottom crust; press to seal. Crimp with a fork all around the edge.
3. Using a pastry brush, lightly brush lattice with egg wash, and sprinkle with turbinado sugar.
Place pie on a rimmed baking sheet. Bake until filling is bubbling rapidly all over, 60 to 70 minutes (tent with aluminum foil when crust starts to brown, about 40 minutes). Transfer pie to a wire rack, and let cool to room temperature, at least 3 hours.