Scatter reserved scallion tops over soup, then drizzle with 1 Tbsp. toasted sesame oil. Step 7 Ladle soup into shallow bowls, making sure to distribute dumplings among the bowls as evenly as possible.

The combination of tomato, egg, and noodles is a beloved dish in the cuisine of Hong Kong cha chaan teng, tea cafés that date back to the 1850s.