Strawberry Rhubarb Pie

Name: Strawberry Rhubarb Pie
Prep time: 50 min
Cook time: 1 h 5 min
Total time: 1 h 55 min
Cuisine: American
Ingredients: 2 pie dough disks for a 9-inch pie, store bought or homemade (double this recipe ); 1 to 1 1/2 cups (200 to 300 grams) granulated sugar; 1/4 cup (28 grams) Instant ClearJel or cornstarch; 12 ounces (335 grams) bright red rhubarb, trimmed, sliced 1/2-inch thick (about 4 cups); 1 pint strawberries, cored, cut in 1/2-inch dice (about 2 cups); Juice of 1/2 lemon; 1/2 cup (50 grams) crushed cookies (Nilla wafers, ginger snaps, or Biscoff), optional; 1 tablespoon unsalted butter, in small cubes; Egg wash (1 egg beaten with 1 tablespoon water and a pinch of salt); Sparkling sugar, to decorate