The dried kelp just bought back usually contains thick salt and a lot of sand, and because of seawater pollution, the arsenic content is high, so it must be soaked and cleaned in advance before cooking. After the edible kelp is cleaned, it should be soaked in water again, and the water should be changed constantly. Generally, it can be made by soaking it in clear water for more than 6 hours. But if it is pollution-free kelp whose quality can be guaranteed, you don't have to go to so much trouble, because the soaking time is too long, the nutrients in kelp will also dissolve in water.

Soak kelp with rice in advance; Or when cooking kelp, add a little (not too much) edible alkali or baking soda. After boiling, soak kelp in cold water, clean it, and then take it out for eating. Or, open the dried kelp in groups, steam it in a steamer for about half an hour, and then soak it in clear water for one night. Can make kelp not only crisp and tender, but also soft and delicious.