Combine the blanched veal foot with the water and simmer it for 6 hours. Skim carefully, adding cold water from time to time to compensate for evaporation.
Combine the onion, leeks, carrots, garlic, fennel, tarragon, parsley, and thyme. Add the egg whites and lime juice. Thoroughly work in the egg whites with a wooden spoon or clean hands. Place in a <