Mix beef, veal, bread, and seasonings. Form into balls. Bring brine to boil (water, peppercorns, celery, bouillon). Add meatballs and simmer 10-15 minutes. Remove with slotted spoon. To 2 1/2 cups sieved brine, add paste of butter and flour. Cook. Add lemon juice. Pour over meatballs. Serve with buttered noodles.