3/4 cup packed brown sugar
2 tablespoons cornstarch
1 teaspoon ground cinnamon
1/4 teaspoon ground ginger
1/8 teaspoon kosher salt
6 cups fresh sliced peaches
2 tablespoons lemon juice
2 rectangular pieces of pie dough rolled out to approximately 11×14-inches*
1 egg, beaten
Heat oven to 400-degrees F. Position oven rack in bottom third of oven.
In large bowl, whisk together brown sugar, cornstarch, cinnamon, ginger and salt. Add peaches and lemon juice; toss to coat. Set aside.
Fit one piece of pastry dough into an ungreased 9x13x1-inch sheet pan (quarter sheet pan). Allow access overhang. Do not trim. Pour peach filling into crust and spread evenly.
Place remaining piece of dough on top.** Pinch edges of two crusts together to seal, tuck under any extra pastry crust, as needed. Use a knife to cut vents across top of pie crust.
Brush crust with beaten egg. Optional: evenly sprinkle top with about a tablespoon of sugar.
Bake for 35-40 minutes, until bubbly and golden brown. Remove from oven and set aside to cool completely before slicing (if you can wait that long!).