Peach and Nectarine Cobbler with Sage Biscuits and Honey Mead Filling

Name: Peach and Nectarine Cobbler with Sage Biscuits and Honey Mead Filling
Ingredients: 1 cup (225 g or 2 sticks) unsalted butter; 3 cups (420 g) all-purpose flour; 2 tablespoon white granulated sugar; 3 tablespoon fresh chopped sage leaves; 4 teaspoon baking powder; 1/2 teaspoon baking soda; 1 1/2 teaspoon kosher salt; 1 1/4 cup cold buttermilk; 1 1/2 pounds nectarines; 1 1/2 pounds peaches 1 cup (200 g) white granulated sugar 1/4 cup (35 g) tapioca flour (sometimes called tapioca starch) or cornstarch 1/2 teaspoon nutmeg zest of 1 orange 2 tablespoon balsamic vinegar 1 tablespoon vanilla extract 1 cup sweet honey mead (see headnote above); 1 cup (200 g) white granulated sugar; 1/4 cup (35 g) tapioca flour; 1/2 teaspoon nutmeg; zest of 1 orange; 2 tablespoon balsamic vinegar; 1 tablespoon vanilla extract; 1 cup sweet honey mead