Meaty pork ribs are simmered until tender in a rich broth, then served over noodles with greens. This hearty, protein-rich family soup is deeply comforting and perfect for cold weather meals.
Rinse pork ribs under cold water; place in a large pot, cover with water, and bring to a boil over high heat to remove impurities. Boil for 5 minutes, then drain and rinse ribs.
Add cleaned ribs back to the pot with 12 cups fresh water, sliced ginger, onion (halved), and garlic. Bring to a simmer over medium-low heat, skimming the surface as needed.
Reduce heat to low and partially cover. Simmer gently for 90 minutes until ribs are very tender, ensuring the liquid remains at a gentle bubble (do not boil vigorously).
Season the broth with soy sauce, salt, and black pepper. Continue simmering uncovered for 15 more minutes to deepen flavor.
While broth is finishing, cook wheat noodles in a separate pot following package instructions. Drain and rinse briefly under warm water.
Add bok choy and half the scallions (cut into 2-inch pieces) to the broth and simmer for 3 minutes for crisp-tender greens.
To serve: Divide noodles among bowls, ladle hot pork ribs and broth over noodles, and top with remaining thinly-sliced scallions as garnish.