Most of the dishes in hamburgers are lettuce, and a few are kohlrabi, purple cabbage or corn kernels. Lettuce can be eaten directly, not only as hamburgers and sandwiches, but also after being pickled in cold sauce. You can cook it in hot water for one minute, and then add a little oyster sauce, lettuce and vinegar. It's very delicious.

Usually eating hamburgers has a layer of vegetables, and they are raw and fresh vegetables. This vegetable is called lettuce. Lettuce is an annual or biennial herb. It tastes sweet, crisp and refreshing and can be eaten raw directly. Although lettuce is common in China, it is not a native plant. It was first planted in the Mediterranean coast of Europe, and later introduced to China, where it was widely distributed.

Nutritional value of lettuce

Lettuce is a kind of vegetable with very rich nutritional value, which contains very high iron, calcium and copper. Lettuce is an alkaline food and can be neutralized with other acidic foods, such as grains or meat. Lettuce is also a very common dish when eating hot pot.

As a vegetable, lettuce contains a lot of dietary fiber, which can increase our appetite and help digestion and absorption. Vegetables contain a lot of water and have relatively low calories. If you lose weight, you can choose lettuce as the staple food. The content of vitamin C and vitamin B in lettuce is also high.