In the era when there was no microwave oven, people used various methods to heat dishes.

One method is steaming. Put the vegetables in a pot and steam them in water. Suitable with meat, rice and pasta.

One method is to cook again, which is more suitable for general cooking.

There is also the method of frying, which is still a common method of processing food, such as frying wonton, in order to obtain a new flavor.

In a word, microwave heating is only a convenient way to heat dishes, but other methods are also widely used.