Old oil refers to a kind of oil quality produced after repeated use, which is usually used when frying food. If you want to cook the most delicious food with old oil, you can try the following methods:

1. Choose the ingredients suitable for frying. Some ingredients themselves have strong fragrance, such as chicken and shrimp, which can give off attractive fragrance after frying.

2. keep the frying oil clean. Impurities and residues in fried oil will affect the quality of oil and the taste of food, so it is necessary to clean the oil pan and replace the oil regularly. At the same time, it is necessary to ensure that the fire is suitable and the oil temperature is moderate, so that the food can be fried evenly, crisp and delicious.

3. add seasoning. Before frying food, a small amount of seasonings such as onion, ginger, garlic, pepper and star anise can be added to the oil to improve the flavor of fried oil. But be careful not to add too much, otherwise it will affect the taste of food.

4. marinate before frying. For some meat ingredients, salt, monosodium glutamate, soy sauce and other seasonings can be marinated for a period of time before frying to make them more tasty. However, it should be noted that the curing time should not be too long, otherwise it will affect the taste and shape of food.

5. increase the frequency of frying oil. The smell of old oil mainly comes from the burnt smell of oil after repeated use. Therefore, the more times you use old oil, the stronger the smell of oil. However, it should be noted that the use of old oil should not be too many times, too much use will affect the health and taste of food.

In a word, in order to make the most delicious food from old oil, the key is to keep the oil clean, add seasonings properly, and master the temperature and time of frying oil, so as to make the food more delicious.