1. Marinate the beef filling with salt, cooking wine, white pepper, light soy sauce, green onion and ginger.

2. Mix the minced coriander into the meat filling, and use chopsticks to beat in one direction until it becomes sticky.

3. Add water to the pot, bring the sugar cake to a boil, then turn to low heat and start boiling the meatballs.

4. Add the winter melon, add salt to taste, add coriander, and the winter melon ball soup is ready.