Black Friday Soup Part 1 (The Stock)

Pull all remaining meat from one roasted turkey carcass and set aside for soup. Then brown remaining carcass in oven. Meanwhile, cook 1 large onion and 3 stalks celery, diced, in oil or butter in a large pot. Add carcass, 1 gallon water, and 1 T. cider vinegar. Simmer for about 2 hours, skimming often to remove the scum from the top. Strain.