2. Wash black beans and soak them one night in advance.
3. Clean the trotters and remove the hair on them, but they are relatively small.
4. Put cold water into the pot and diced pig's trotters into the pot. After the water is boiled, pour out all the water, add ginger slices, add cold water until the trotters are over, boil over high fire, remove the floating foam on the surface, and cook over low fire for about 50 minutes.
5. Put the soaked black beans and black beans into the rice cooker and add the cooked pig's trotters.
6, the right amount of soy sauce, salt, onion ginger slices and onion segments.
7. Add an appropriate amount of water, almost 1 trotters and 3 parts of water, cover and start to boil over high heat, then turn to low heat for 2 hours.