? 1, onion selection: We try to choose purple-skinned onion, because it is rich in anthocyanins, which has higher nutritional value than yellow-skinned and white-skinned onions, and this purple-skinned onion tastes crisper and sweeter.

2, onion cutting method: cutting onion shreds is skillful, you need to split the core from the middle, and then cut the thick silk with a horizontal knife, never cut it too long. Cut the silk as thick as possible. If it is too fine, it will kill water and soften without cold salad, which will affect the taste.

3. Wash the onion: After the onion is shredded, it should be washed and soaked with clear water, which can not only remove some spicy taste, but also make it more crisp.

4, cold onion method: control the onion water and drain the water inside, then take 300 grams of onion and pour it into a clean basin, add 40 grams of white vinegar, 3 grams of salt and 40 grams of sugar, gently grab and mix evenly, and finally pour 2 grams of sesame oil on the onion, then sprinkle coriander segments on it, and mix the onion evenly to serve.