Soaked lotus seeds in boiling water for about half a day, then cook in boiling water for 3 minutes. Remove and drain. Cook the lotus seeds again in 3 cups boiling water for about 10 minutes until soft.
Smash the lotus seeds into a paste.
Boil 6 cups of water, add sugar, salt and mashed lotus seeds. Then bring to a boil and thicken with cornstarch past