Salted Caramel Apple Pie

Name: Salted Caramel Apple Pie
Prep time: 50 min
Cook time: 1 h 15 min
Total time: 2 h 5 min
Cuisine: American
Ingredients: 3/4 cup granulated sugar; 1/4 cup water; 1 cup heavy cream; 2 tablespoons unsalted butter; 1/2 teaspoon kosher salt; 2 (8- to 10-ounce) store-bought or homemade flaky pie crusts, thawed if frozen; 1 large egg yolk; 1 tablespoon water; 1/2 cup packed dark brown sugar; 1/4 cup all-purpose flour, plus more for rolling; 1 teaspoon ground cinnamon; 1/4 teaspoon ground nutmeg; 2 1/2 pounds Granny Smith or Pink Lady apples (about 6 large or 7 medium), or a combination; 1 tablespoon turbinado or coarse sugar (optional)