1. Generally, after eggplant is cut, it is a better preservation method to soak it in water. At the same time, eggplant soaked in water can also be kept in the refrigerator. If you want to keep eggplant for a long time, you can seal it with plastic wrap and put it in the refrigerator.

2. Soak the cut eggplant in salt water. After salt water enters eggplant, it can destroy the osmotic pressure in eggplant cells, absorb a lot of water, make the sponge of eggplant shrink and collapse, and reduce the oil absorption of eggplant. Soak the cut eggplant in vinegar water. Vinegar water can protect eggplant from oxidation and blackening, and keep the original color of eggplant. In addition, eggplant should not choose iron containers, it is best to choose porcelain containers.