Apple and Fig Cobbler with Eggnog Biscuits

Name: Apple and Fig Cobbler with Eggnog Biscuits
Ingredients: 4 pounds apples (mixed varieties); 1/2 cup dried figs (chopped coarsely); 3/4 cup dark brown sugar (165 g); 4 tablespoons tapioca starch or cornstarch; 1/4 cup brandy or dark rum (see headnote above); 1 teaspoon ground cinnamon; 3/4 teaspoon ground nutmeg; 1/2 teaspoon kosher salt; 2 1/4 cups all-purpose flour; 1/4 cup white sugar (50 g); 2 tablespoons baking powder; 1/2 teaspoon ground nutmeg; 6 tablespoons cold unsalted butter; 3/4 cup eggnog (store bought); 2 tablespoons turbinado sugar (or white sugar)