To prepare a day after thanksgiving turkey carcass soup recipe, you'll first need to cut the turkey in half lengthwise. Then, cut each half into 4 equal sized pieces. Cut each piece into 2 inches (5.1 cm) thick slices. Place the cut pieces in the bottom of an 8-inch (22-centimeter) soup pot. Cover the pot with water and bring to boil. Reduce the heat to medium-low and simmer until the meat is tender, about 1 hour. Remove from heat and let stand for 10 minutes. Serve with sour cream, if desired.