Add soy sauce; simmer 20 to 25 minutes or until meat is tender and falling off the bone. Add sugar; simmer 10 minutes more.
Serving suggestion: Place shredded iceberg lettuce, firm tofu and spinach leaves in clay pot. Add one piece beef and beef cooking liquid to cover, making sure to include garlic cloves; bring to a boil. Garnish with cilantro and chopped scallions; serve with steamed jasmine rice.
Recipe created by Alexander Ong, Betelnut Pejiu Wu (San Francisco, CA)