02Reduce heat to simmer, and cook, skimming from time to time, 1 hour. Add 1 tablespoon sea salt, peppercorns, bay leaves and garlic. Tie herbs together, and add. Continue simmering 1 to 1 1/2 hours, until meat is very tender.03While meat is cooking, mix horseradish and apple with lemon juice, and set aside.04Remove meat from pot, and cover with foil. Line large sieve or colander with cheesecloth or linen napkin, and place over very large bowl. Pour in contents of pot. Do not press liquid from vegetables. Transfer strained broth to 6-quart saucepan.05Set carrots, parsnip, celery root and celery stalks aside. Discard everything else. Peel and dice carrots, parsnip and celery root. Dice celery stalks. Set aside.06Gently reheat broth. Add salt to taste. Serve some of the broth as a first course, with diced celery root, parsnip and celery stalks. Then serve meat. If it needs to be reheated, steam briefly over remaining broth. Slice meat 1/2-inch thick across grain. Place in soup plates, with diced carrots, moisten with hot broth, and top with apple-horseradish, sea salt and chives. Serve.