This is a good recipe for the age-old issue of disposing of the festive leftover turkey. Boil the carcass of the turkey (legs, thighs, or any other part of the turkey left on the bone) in a large pot of water until the meat falls off the bone. To the broth and meat, add the leftover sliced meat and gravy, the onions, garlic, and celery, parsley, salt and pepper, okra and sausage. Cover and allow to boil slowly for 1-1½ hours, depending on the thickness desired. Sprinkle individual servings with gumbo file and serve over rice.