The weather is cold, stewing a pot of soup is better than any dish.
Tomatoes, beef, potatoes, and onions are cut into pieces of almost the same size.
The beef pieces are first boiled in the pan for a while, and the color is removed to clean the floating foam.
Stir in the onion, add the tomato, stir-fry the red oil, add the potatoes and beef, stir fry evenly.
Add a little salt, sugar, soy sauce and continue to stir fry.
Pour hot water from the ingredients, boil over high heat, and simmer.
About 30 minutes or so, if the amount of water in the middle is small, add water. It is best to add it at one time.
It can be seasoned according to the taste before the pan.
A sweet and sour soup, nutritious and delicious.