How to be a good Luo Songtang? A famous Russian dish-Luo Songtang. Luo Songtang is very picky about the choice of materials. Beef tendon (500g) is generally used. You can mix some fresh vegetables according to your personal preferences and nutritional needs, such as cabbage (80g), tomato (50g), carrot (50g), potato (50g), pumpkin (50g) and purple onion (50g). In the production process, beef tendon should be washed first and soaked in clear water for 2 to 3 hours to remove its fishy smell. After that, making beef soup is the key to this dish. Put beef tenderloin into a pressure cooker, add water to beef, bring it to a boil, skim off the foam, add seasonings such as aniseed, onion and ginger slices, then cover the lid of the pressure cooker, install a valve and pressurize it for 40 to 50 minutes to get beef soup, which is an important raw material of Luo Songtang. Turn off the fire and let it cool. Cut the cooled beef into pieces for later use. At the same time, wash Chinese cabbage, tomatoes, carrots, potatoes, pumpkins and purple onions and cut them into pieces for later use; Then, heat the pan, add 1/4 pieces of butter and two spoonfuls of flour, and mix well; Add tomato sauce and mix well; Add purple onion and stir fry, then pour in beef soup. After the beef soup is boiled, the chopped cabbage, pumpkin, carrot, potato, tomato and beef are put into the pot and cooked, and then the delicious Luo Songtang can be obtained. The beef used in this dish is a high-protein and low-fat food. Its nutrition is easily digested and absorbed by children, the elderly and pregnant women, and it is a valuable endurance resource. Beef is rich in protein, with 20. 1g per 100g of beef, which is 3.3% more than pork. The amino acid composition of beef is closer to human needs than pork, and the biological value of protein is as high as 79, which is also higher than pork. Beef can improve the body's disease resistance, especially suitable for people who are nursed back to health after surgery and illness, such as supplementing blood loss and repairing tissues. The lysine content in beef is 2 106(mg/ 100g), which is 30% more than that in pork. It is especially important for China people whose staple food is cereals (lacking lysine). Beef can just make up for the lack of lysine in grains, realize the complementary function of protein and improve the bioavailability of protein. If you often feel tired, lose concentration, and your eyes are prone to congestion, redness, nausea, dizziness, hair loss, and anemia, it is likely that you lack lysine, so beef will be added to the table at home. It can not only make attention highly concentrated, eliminate fatigue, but also make normal use of fatty acids that make energy, which is conducive to weight loss. Beef is also an excellent source of iron and zinc. About 50% to 60% of primary and middle school students in China suffer from iron deficiency anemia, and about 60% suffer from zinc deficiency. The lack of zinc and iron is the enemy of students' intellectual development and learning ability, which is mostly related to the unreasonable dietary structure of children and the inability to choose food scientifically. There are many kinds of fresh vegetables in Luo Songtang, such as cabbage, which is one of the most important vegetables in the west. Rich in vitamin C and folic acid, it is very beneficial to prevent anemia in primary and secondary school students, white-collar women, menopausal women and the elderly and promote the absorption of zinc and iron. In addition, cabbage also contains a special ulcer healing factor, called "vitamin U", which can help accelerate the healing of ulcer surface and is extremely beneficial to people who often suffer from oral ulcer, gastric ulcer and duodenal ulcer. Carrots, pumpkins, tomatoes and potatoes are well-known foods. They not only play the role of color matching, but also contain rich nutrition. For example, beta-carotene provided by orange carrots and pumpkins can be converted into vitamin A in the small intestine, which can prevent premature aging and cataracts, protect eyesight, nourish the brain, prevent upper respiratory tract infection, and improve immunity and resistance; Both red tomatoes and orange pumpkins contain a dietary fiber called pectin, which has the functions of relaxing bowels and preventing constipation. Potatoes are nutritious, low in calories, high in protein, and contain a variety of vitamins and trace elements. The starch in potatoes is slowly absorbed by the human body, which can prevent students from being obese. It is known as the "second bread" in Europe and America. Pumpkins and potatoes are both foods rich in potassium, which can protect the heart and lower blood pressure. Luo Songtang contains a large number of antioxidant foods, such as lycopene in tomatoes, β -carotene in pumpkins and carrots, and vitamin P (bioflavonoids) and polyphenols in tomato skins. These are powerful antioxidants, which can prevent the oxidation of "free radicals" in the body, prevent cancer lesions caused by cell damage, delay aging and achieve the purpose of prolonging life. Luo Songtang is a common dish for Russians. It not only emphasizes the collocation of meat and vegetables, but also reflects the balance of acid and alkali, color (red, orange, blue and purple, white) and thinness. It is a special dish with heavy nutrition and balance.