A wholesome, deeply comforting soup crafted from slow-simmered stock, aromatic garden vegetables, and fresh herbs, served with crusty bread.
Blanch the pork in boiling water for 3 minutes, then drain.
Bring the pork, ginger, and water to a boil, then simmer 40 minutes.
Stir in the mustard greens and tomatoes and simmer 20 minutes more.
Add the tofu and fish sauce, simmer 5 minutes, and serve hot.