Rinse the red beans thoroughly.
Soak the beans in water for at least 6 hours.
Put the soaked beans in a pot, add water, and boil.
Discard the boiling water, add fresh water, and boil the beans until very soft.
Once the beans are tender, drain and mash them finely.
In a pan, combine the mashed beans, sugar, and salt, and stir over medium-low heat until it thickens.
When the paste reaches a thick consistency, remove from heat and let it cool.