2. Water spinach is not allowed to be cut with a knife. You can only pinch it by hand. If you cut it with a knife, it will be oxidized and will definitely turn black. Many vegetables cannot be cut with a knife.

3. When washing spinach, you can drop a little lemonade or wash vegetables with vinegar to prevent it from turning black quickly.

4. Don't let the water spinach stay in the air for more than 30 minutes. If it is left for a long time, it will also make the spinach black on both sides.

5. When frying spinach, give enough oil, and the oil temperature must be 8 layers hot. Stir-fry the spinach over high fire, and finally order a few drops of water. Add salt and other seasonings. Stir-fried spinach is very beautiful and delicious.

6, stir-fried spinach must grasp the time and heat, the time is short and unfamiliar, it will turn black after a long time, cooking must be a big fire, lock the moisture of spinach, in order to make spinach tender.