1. Simply wash in clean water to remove impurities such as silt and dust. Don't rub it hard, and don't soak it in water for a long time, because the nutrients (such as iodine, mannitol, vitamins, etc.) in kelp will dissolve into water for a long time, and the nutritional value will be reduced. There is a layer of white powder on the surface of fresh kelp, which is mannitol, which is very good for human body. But some people mistakenly thought it was moldy and washed it away.

2. Put it in a pot and add a proper amount of water, and keep it for 3-5 minutes after boiling. It doesn't need to be too long. Too long will not only lead to nutrient loss, but also make the kelp sticky.

3. Take out the kelp, put it in clean water and wash it a little. Then, you can make cold dishes, stir-fry or stew soup according to your own wishes. If it's cold, it's delicious to put some sesame oil in it.