1. It is best to choose the new broad beans of that year, which are full, uniform in size and intact, and remove bad broad beans such as moldy black spots, and wash them with clear water to remove impurities;

2. Put the broad bean skin into water to fully absorb water and expand, and it takes about 1-2 hours for dry broad beans to foam;

3. Rinse with clear water, and the peeled bean black line accounts for about 1/3 of the whole broad bean. Lazy people can cut a hole in broad beans with a knife. Eliminate broad beans that cannot be soaked, commonly known as "iron beans";

4. After draining the water, put it in a pot and fry it until the water is completely evaporated.

5. Prevent burning, watercress is prominent, and the color is yellow. Drain oil and cool after taking out, sprinkle some salt according to the taste, and the taste is crisp and refreshing.