1, black beans soaked in vinegar. Wash the black beans and put them into the jar. Soak black beans in rice vinegar. If the beans absorb vinegar, vinegar can be added. After a long time, the vinegar will grow a film and you can throw it away. If the vinegar is cloudy, change it again. Store in a cool place or refrigerator for 10 days before eating.
2, black beans and red dates soup. Wash black beans and soak for 12 hours. Wash the red dates for later use. Put black beans and clear water into a casserole, bring to a boil over high fire, simmer until the beans are cooked, and add red dates and brown sugar for 20 minutes.
3. Stewed trotters with black beans and kelp. Wash black beans and braised pig's trotters, put them into a casserole, add ginger slices, boil them over high fire, put them into the sea, and cook them slowly with slow fire until the black beans are soft and the kelp is delicious.