Hello, because the main function of onion is to reduce blood fat, and after heating and frying, it has a strong flavor and is suitable for red meat, such as beef and mutton. With these two ingredients, the nutrition of the food can be fully absorbed by the human body, and there is no need to worry that eating too much beef and mutton will lead to an increase in blood lipid and blood pressure. Onions also played a role in improving the taste during this period. It is recommended to stir-fry with beef and mutton. I hope it works for you.