How to keep warm when the food is ready?

The method of keeping the temperature of cooked food is as follows:

1, preheat the container to be filled with vegetables before serving, so as to warm the dish;

2. Stir-fry the vegetables and cover the lid tightly after serving;

3, it is placed in the interlayer of the rice cooker for heat preservation, and the heat preservation effect is good;

4. It can be put into a casserole with good heat preservation ability;

5. Put it in a steamer.