apple pie recipe

INGREDIENTS 2 (9") pie crusts 7 large Granny Smith apples (peeled, cored and sliced into ½ inch slices) ½ cup granulated sugar ½ cup light brown sugar (loosely packed) 2 tablespoons all-purpose flour 1 teaspoon ground cinnamon ⅛ teaspoon ground nutmeg 1 tablespoon lemon juice (plus the zest of half of a lemon) 1 large egg (lightly beaten in a small bowl for egg wash) 2 tablespoons sanding sugar