Soak rice for a while, or soak in light salt water. Prepare sweet potatoes and chopped green onion. Heat the pan and add some oil to stir-fry chopped green onion. Add beans and stir fry.

When frying beans, the beans will keep changing color. Add some salt and allspice powder and stir well.

Wash the golden beans with clear water first, and then blanch them with boiling water. Attention! The blanching time should not be too long. Beans can be cooked once. Put the scalded beans in the basket to dry for a while, and just dry the water on the surface of the beans.

Put the beans with no water on the surface into fresh-keeping plastic bags, squeeze out the air as much as possible and tie the bag mouth tightly, and put them in the freezer for preservation.