Mix all the ingredients in a deep vessel. Bring it to boil. Boil for 5 minutes. Add Soya sauce and vinegar. Mix cornflour with little water and add in the soup. Boil for 2 minutes. Beat egg lightly. Add in the soup in a thin stream. Put off the fire.

In a serving bowl, sprinkle a pinch of Melam pepper and a few drops of vinegar. Pour the soup. Sprinkle chilly oil and serve hot.