Rinse the red beans thoroughly and soak them.
Put the beans in a pot and boil them until fully cooked.
Blend the cooked beans in a blender until smooth.
Strain through a sieve to remove the skin of the beans.
Simmer the red bean paste, sugar, and salt in a pan.
Keep stirring and simmering until the paste thickens to your desired consistency.
Let the finished red bean paste cool.