With this recipe in your arsenal, you'll be the envy of professional bakers.You Will Need* Pastry dough for a double piecrust* 1 1/2 lb. sweet apples, like Golden Delicious, peeled, cored, and thinly sliced* 1 1/2 lb. tart apples, like Granny Smith, peeled, cored, and thinly sliced* 3/4 c. plus 1 tbsp. sugar* 1 tsp. fresh lemon juice* 1 tsp. ground cinnamon, divided* 1 tbsp. all-purpose flour* 3 tbsp. unsalted butter, diced* 1 egg, beaten* Rolling pin* Pie plate* Plastic wrap* A large bowl* A...