1, what soup should I stew? If it is bone or meat, be sure to cover it, which can reduce the loss of nutrients and shorten the cooking time. But if it is vegetable soup, it is recommended not to cover it, otherwise the vegetables will lose their freshness.

The color of the dishes in the soup is not important. On the one hand, the nutrition can be fully absorbed into the soup, on the other hand, the vegetables can be softened and eaten healthily, and the pot cover will cook quickly, so that the cooking time will not be long, but the nutrition can be retained.