Preheat over to 400 degrees. Combine remaining ingredients in large bow. Toss gently to combine.
Roll out second dough disc on lightly floured surface to 11-inch round. Cut into 14 1/2-inch-wide strips. Spoon filling into bottom crust. Arrange 7 dough strips atop filling, spacing evenly. Form lattice by placing remaining dough strips in opposite directions atop filling. Trim ends of dough strips even with overhang of bottom crust. Fold strip ends and overhang under, pressing to seal. Crimp edges decoratively.
If wanted: mix 1 egg yolk with 1 teaspoon water and brish over crust.
Transfer pie to baking sheet. Bake 20 minutes. Reduce oven temperature to 350 degrees. Bake pie until golden and filling thickens, about 1 hour 25 minutes.