Wash the red beans thoroughly and soak them for about 1 hour.
Put the soaked red beans in a pot, add enough water to cover them, and boil.
Once the beans are cooked, strain them to separate the beans from the boiled water.
Mash the beans finely, then add the mashed beans and the boiled water back into the pot and bring to a boil.
Mix glutinous rice flour with water to make dough and shape it into small rice balls.
When the porridge is boiling, add the rice balls and cook until they float to the surface.
Season with salt and serve in a bowl.