Roll out 1 disk of dough to just under 1/4 inch thick on a lightly floured surface and fit into a 9-inch glass pie plate. Roll out remaining disk of dough to a 13-inch round. Rolled-out dough can be refrigerated up to 8 hours. (Be sure to let the 13-inch round sit at room temperature until pliable before topping pie, or it will break.)

Place prepared blueberries in pie shell, brush edges with water, and cover pie with top crust. Trim excess, leaving a 1-inch overhang. Fold top edge over bottom crust to seal, and crimp as desired. Cut steam vents in top crust. Freeze entire pie for 30 minutes.

Meanwhile, preheat oven to 415 degrees Fahrenheit with rack in lowest position. Brush pie with egg wash and sprinkle with sanding sugar (if desired). Place a foil-lined rimmed baking sheet on floor of oven to catch any drips.

Bake pie on lowest rack for 15 minutes at 415 F. Reduce oven temperature to 375 degrees Fahrenheit and bake until well browned, for an additional 45 minutes.

After total bake time of one hour: Tent pie with foil and continue to bake until bubbling through vents, about 20 minutes more. Let cool completely on a wire rack, at least 4-6 hours. Pie can be made 1 day ahead and stored at room temperature.