Rinse the red beans thoroughly.
Soak the beans in water for 5–6 hours.
Boil the soaked beans and discard the water.
Add fresh water to the beans and boil until fully cooked.
Blend the cooked beans smoothly in a blender.
Strain the smooth beans through a sieve to make the paste.
Place the paste in a pan, add sugar and salt, and simmer.
Stir and cook until glossy and the paste is done.