Salted Caramel Apple Crisp

Name: Salted Caramel Apple Crisp
Prep time: 15 min
Cook time: 45 min
Total time: 1 h
Cuisine: American
Ingredients: 10 cups sliced apples (see post for more on this); 1 teaspoon fresh lemon juice; 1 and 1/2 tablespoons all-purpose flour; 1/2 cup granulated sugar, packed; 1/2 teaspoon ground cinnamon; 1/2 teaspoon nutmeg; 1 cup all-purpose flour; 1 cup packed brown sugar; 1/2 cup quick-cooking oats; 1/2 cup pecans, chopped; 1 teaspoon baking powder; 1 teaspoon ground cinnamon; 1/4 teaspoon ground nutmeg; 1/2 cup (4 ounces) unsalted butter, cold and cubed; 1 cup salted caramel sauce; Flaky sea salt, for sprinkling, optional; Ice cream, for serving, optional