2. Practice:
(1) Put sweet potato pieces, green onions and water into a soup pot and bring to a boil.
(2) After the water is boiled, add tomato sauce, cook until the water boils again, and simmer for 20 minutes.
(3) Add the cut lactone tofu and turn to medium heat for boiling.
(4) After simmering for 5 minutes, season with pepper and salt.
3, weight loss principle: sweet potatoes, tofu, tomatoes, delicious, you can lose weight with contemporary meal soup. Sweet potato is an alkaline food, which can neutralize excessive acidic substances produced by acidic foods and prevent acidification of blood and body fluids. In addition, sweet potato can also reduce subcutaneous fat, avoid obesity and prevent diseases.