It is suggested to heat sandwiches in microwave oven after refrigeration, which is convenient and quick.

Generally, a medium-sized sandwich after refrigeration can be eaten only by microwave heating for 20-30 seconds, and the time is very short. It can also be heated evenly inside and outside to avoid overheating affecting the delicacy of food and kill bacteria on the surface of food. This is the simplest and most practical method. If you don't have a microwave oven at home, you can steam it in a steamer or fry it in a wok.

Sandwiches and sandwiches are based on the transliteration of the English word sandwich. Sandwich is a typical western food, made of two pieces of toast with a few pieces of meat, cheese and various condiments. Simple to eat, it is popular all over the world in western countries.