Rinse the red beans thoroughly and soak them.
Put the beans and water in a pot and bring to a boil.
Once the beans are fully cooked, drain them using a sieve to remove excess water.
Blend the cooked beans until smooth using a blender.
In a pan, add the blended beans, sugar, and salt. Simmer over low heat while stirring.
When the red bean paste comes together smoothly, turn off the heat and let it cool.