Why doesn't the cooking in the hotel change color?

Fried vegetables will turn black because there is too much water. If you try to reduce water before cooking, the fried vegetables can stay black for at least 20 minutes. I found the secret from the hotel chef and did the experiment myself.

Don't pile up some vegetables after they are put in the plate. Pick out an open space in the center of the dish with chopsticks, so that the vegetables can dissipate heat faster, so as to avoid discoloration of the vegetables due to high temperature.

The correct way is to do this:

According to the weight of vegetables, put an appropriate amount of water into the pot and pour 50g- 100g of edible oil. 2. After the water is boiled, blanch the vegetables in the pot until the leaves turn emerald green. Take them out and drain them immediately. 3. Wash the pot and pour the cooking oil. Immediately after the garlic is fragrant, pour in the vegetables, turn over the wok and add salt.