3 tablespoons all-purpose flour, plus more for work surface
1 to 1 1/2 recipes Pate Brisee Deep-Dish Pate Brisee
1 large egg yolk
1 tablespoon heavy cream
3 pounds assorted apples, such as Macoun, Granny Smith, cortland, Jonagold, or empire, peeled, cored, and cut into 1/4-inch-thick slices
2 tablespoons freshly squeezed lemon juice
1/4 cup granulated sugar
1 teaspoon ground cinnamon
1/4 teaspoon ground nutmeg
1/8 teaspoon salt
1 tablespoon unsalted butter, cut into small pieces
Sanding sugar, for sprinkling