1. Wash several kinds of coarse cereals and soak them in water for 2-3 hours (if they are hot, they need to be soaked in the refrigerator). If it is not suitable for work during the day, you can soak in Mi Dou in the morning, put it in the refrigerator and cook it directly when you come back at night.

2. After soaking coarse cereals for a long time, wash the rice and soak it in water for 30 minutes (or soak the rice directly in coarse cereals). At the same time, peel the purple potato and cut it into small pieces.

3. Mix the soaked rice with miscellaneous grains beans and purple potato pieces, pour into the rice cooker, pour in the water for soaking beans (more water than when cooking), and cook. After the rice cooker jumps to the heat preservation file, it needs to stew for a while.

Cooked miscellaneous grains rice, because there are black rice and black beans, is purple in color, and purple potatoes sink under the rice.