Rinse the red beans thoroughly and soak them for at least 6 hours.
Put the soaked red beans in a pot, pour enough water, and boil.
Drain the boiled beans using a strainer to remove excess water.
Return the beans to the pot, add allulose syrup and salt, and simmer over medium-low heat while stirring.
Once the paste thickens, turn off the heat and let it cool.