Ingredients is not available.
- Scald duck in hot oil for 4-5 minutes. Dish out and rinse off the excess oil.
- Soak salted green stems for 30 minutes then drain well. Bring water to a boil in a stockpot.
- Put in the duck and the rest of the ingredients. Cover and bring to the boil then reduce the heat to low and simmer for 1½-2 hours. Top up with a little more water if necessary.
- Adjust soup with salt and sugar to taste.