04Prepare ducks: Heat oven to 325 degrees. Place ducks on a rack in a roasting pan. Cook, uncovered, for 3 hours, periodically draining off fat in pan. Raise heat to 400 degrees, and roast an additional 30 minutes to crisp skin.05To serve, remove ducks from oven and place on a carving board. Cut each duck into four pieces. Cut away meat from rib cage, discarding rib bones. Arrange on a serving platter, crispy skin side up. Serve with blueberry sauce.