6. As the bird cooks, baste it with the pan juices every 20 minutes using a spoon. After the first hour, remove the roasting pan from oven and, using two pot holders, carefully turn the turkey breast side up. Baste it with the pan juices and continue roasting. (Cover the turkey loosely with foil if it threatens to burn.) When an instant-read thermometer inserted in a thigh (without touching bone) reaches 165°–170° (after about 2 hours), move the turkey to a platter and let it rest in a warm place for 20 minutes.

7. Meanwhile, set the roasting pan over 2 burners to make the gravy. Skim off excess fat from pan juices and remove two-thirds of the vegetables from the pan. Cut the rest of the vegetables into small pieces. Add 1⁄3 cup calvados (apple brandy), 1⁄2 cup white wine, and 1⁄3 cup apple cider. Bring to a boil over high heat and, using a wooden spatula to scrape up all the caramelized bits, cook the liquid down to a syrup, 6–8 minutes.

8. Remove broth from refrigerator; skim off fat. Reheat all but 1 cup. Add two-thirds of the heated broth to the pan. Boil, stirring constantly, until reduced by half, about 15 minutes. Stir the remainder of the heated broth into the pan and bring to a boil. To thicken the gravy, add 1⁄4 cup flour to a tall glass. Stir the 1 cup of reserved, chilled broth into the flour until there are no lumps. You've made a slurry. Whisk it into the bubbling gravy. Keep simmering and whisking until gravy is smooth and thick enough to lightly coat the back of a spoon, about 20 minutes. Now taste it. If you taste raw flour, simmer the gravy for another minute.

9. Stir 8 torn basil leaves into the gravy and season with kosher salt and freshly ground black pepper, if necessary. Pour the gravy into a bowl or another serving vessel. Carve the turkey and arrange on a large platter. Serve with the gravy passed separately.