Russian Luo Songtang is hot and sour, more sour than sweet. Shanghai people are not used to it. Later, influenced by the purchase of raw materials and local tastes, Luo Songtang with a unique Shanghai style was gradually formed. Now in Shanghai, almost every family can make Luo Songtang, but the ingredients taste different. It used to be one of the main foods for ordinary people, so how to do it mainly depends on what is at home.
Luo Songtang is rich in things and comprehensive in nutrition. Sour, salty and slightly sweet, suitable for all ages. Beef has a high nutritional value. In ancient times, there was a saying that "beef tonifies qi, and the work is the same as astragalus". Anyone who is weak and sick, has stagnant qi, sallow complexion, weakness of muscles and bones, and spontaneous sweating due to qi deficiency can stew beef. Tomatoes are rich in carotene, vitamin C and B vitamins. Onion is the only plant containing prostaglandin A, which is a natural blood thinner. Prostaglandin A can dilate blood vessels and reduce blood viscosity, thus lowering blood pressure, reducing peripheral blood vessels, increasing coronary blood flow and preventing thrombosis. Potatoes contain a lot of carbohydrates, as well as protein, minerals (phosphorus, calcium, etc. ) and vitamins. Cabbage is rich in potassium and folic acid, which has a good preventive effect on megaloblastic anemia and fetal malformation.