Plum Kidney Beans

Soak the white kidney beans overnight in advance.

Prepare dried plums and rock sugar.

Put the kidney beans, preserved plums, and rock sugar into a pressure cooker, add water to cover the ingredients by the thickness of a finger joint, and cook on the highest setting until done.

The beans are smooth, and the sweet and sour taste is really good.

Put it in the refrigerator to soak overnight; the taste is even better, cool and sweet and sour, making it an especially great summer snack for beating the heat.