The earliest hamburger was mainly composed of two pieces of bread and a beef pie. In modern hamburgers, in addition to the traditional beef pie, the second layer of buns is also coated with butter, mustard, ketchup, salad dressing and so on. , and then put in tomato slices, onions, vegetables, pickles and other foods, so that the main and non-staple foods can be eaten at the same time.
This kind of food is convenient to eat, delicious and comprehensive in nutrition, and has become one of the convenient staple foods that sell well in the world.
4, hamburgers are high in calories and contain a lot of fat.