Azuki beans are commonly used in traditional Japanese desserts. This sweet soup for winter is eaten between meals as a snack, but never after the meal as it is quite filling.
Soak the azuki beans overnight in 1 litre/1¾ pints/4 cups water.
Pour the beans and the soaking water into a heavy large pan, then bring to the boil. Reduce the heat to medium-low and add the baking powder. Cover the pan and cook for about 30 minutes. Add a further 1 litre/1¾ pints/4 cups water, and bring back to the boil. Reduce the heat to low, and cook for a