Taiwan's national dish - beef shank braised low and slow with doubanjiang, star anise, and cinnamon until it falls apart, served over noodles in the rich, spiced broth it cooked in.
5.Pour in the water or broth, bring to a boil, then reduce to a gentle simmer, cover, and cook for 2.5 to 3 hours, until the beef is fall-apart tender.
6.Cook the noodles separately in boiling water until just tender, then divide among bowls.
7.Ladle the beef, broth, and tomatoes over the noodles, top with blanched bok choy, pickled mustard greens, and scallions, and serve hot.