Cook the Book: Apple Cobbler with Cheddar Biscuits

Name: Cook the Book: Apple Cobbler with Cheddar Biscuits
Ingredients: 1 tablespoon unsalted butter, at room temperature, for dish; For fruit filling:; 1 cup packed (7 1/2 ounces) medium brown sugar; 3 tablespoons cornstarch; 1/2 teaspoon fine sea salt; 1 teaspoon ground cinnamon; 8 large apples, peeled, cored, and sliced 1/4 inch thick (3 1/2 pounds prepped); Juice of 1 lemon; 1/4 cup (2 ounces) unsalted butter; For biscuits:; 2 cups (10 ounces) all-purpose flour; 2 tablespoons granulated sugar; 2 teaspoons baking powder; 2 cups (4 ounces) grated extra-sharp Cheddar cheese; 1 1/3 cups cold buttermilk, or more as needed