Truly Scrumptious Apple Pie

Name: Truly Scrumptious Apple Pie
Ingredients: 630 grams unbleached all-purpose flour (I use King Arthur); 2 1/2 teaspoons kosher salt; 11 ounces cold unsalted butter, cut into small cubes; 6 ounces cold vegetable shortening, cut into chunks; about ½ cup ice water; 2 chilled pie dough disks, or 1 unbaked 9 pie shell with top crust; 3/4 cups granulated sugar, plus extra for decorating, if desired; 1/4 cup flour; 1/2 teaspoon fresh grated nutmeg; 1/4 teaspoon ground cinnamon; 2 cups Granny Smith apples, peeled, cored and sliced thin; 2 cups Golden Delicious apples, peeled, cored and sliced thin; 2 cups Macintosh apples, peeled, cored and sliced thin; 3 wedges of fresh lemon; 2 tablespoons unsalted butter; 2 tablespoons cream or milk