If it is not thawed, it can be directly put into a steamer, which will lead to the loss of protein and vitamins in food and accelerate the production of propionaldehyde carcinogens.

In the cooking process, the temperature difference between inside and outside is large, the food is unevenly heated, and the taste becomes worse. It is suggested to take it out of the freezer, melt it at room temperature or soak it in clear water to melt the ice cubes, and then put it in a steamer for cooking.