1. The most important point is that lotus root and iron will react chemically. Therefore, contact with iron must be avoided during operation. For example, when cutting lotus roots, try not to use iron tools. You can choose stainless steel knives or porcelain knives. Try to use less iron pots and add some salt to control oxidation.

2. Cut the lotus root into slices and set aside, then put the cut lotus root into clean water. The lotus root slices should be covered with water and soaked for a while.

3. Use a stainless steel pot or non-stick pot to boil a little more water. After the water boils, pour the lotus root slices into the boiling water and blanch them. The time should not be too long.

4. Pour out the lotus root slices and pour them into cold water. If you want to eat them cold, add vinegar and mix well. If you want to eat fried lotus root, add it to the pot again.