Preparation materials: cowpea: 250g, soy sauce: appropriate amount, pepper: 1, cold boiled water: appropriate amount.

1. Wash cowpea with clear water, then cut it into sections and dry it for later use.

2. Prepare a proper amount of soy sauce and adjust it with cold water, so that the pickled cowpea will not be very salty.

3. Prepare a clean container without water, and then put the cowpea and pepper in it.

4. Pour the prepared soy sauce into the container and seal it for one week.