Pick out beans that look shrived, discolored, or broken. Heat a pot of boiling water and add adzuki beans with the water being three inches above the beans so they are fully submerged.Bring to a boil for five minutes, drain the water, and re-add clean water. Bring to a boil again. 1 ½ cup dried adzuki beans, Water for boiling the beans
Cook the beans for one hour and fifteen minutes, checking the tenderness and adding more time as needed. The beans are the perfect tender texture when they easily mash in between your fingers, but are not too mushy/overcooked. When the red beans are very tender and soft, drain the water very well. If you want a smooth red bean paste, leave 4 tablespoons of the water.
Blend the beans in a food processor for the easiest and fastest method. Pulse for a chunky texture red bean paste. For a smooth red bean paste, you can push the beans through a wire mesh strainer with the back of a wooden spoon, or blend until very smooth.
Leftover Bean Water
Over low heat, add the avocado oil to the pot, then add back the mashed red beans and add sugar slowly. Mixing and dissolving the sugar and tasting, adding more sugar if you like. Add the pinch of salt and mix well.
¾ cup granulated sugar - add more sugar to your preference, 1 tsp avocado oil or coconut oil, ¼ teaspoon salt
Very consistently stir the mixture, scraping the bottom of the pot so the red bean paste will thicken as the water evaporates, but not burn and stick to the pot.As soon as the paste is thick and shows that it can stick to the spoon, remove from the heat and transfer to a clean plate or jars, allowing the red bean paste to cool down and further thicken.