Only prepare the lotus root when about to cook the soup. Otherwise, the lotus root will be oxidised.Pressure cooker shorten the cooking time for the soup.If you are boiling the soup using a normal stock pot, put everything into the pot except the salt. Bring to a boil. Then reduce heat and let simmer over low heat for at least 1 hour. Season with salt before serving.If your prefer your soup to have a clearer broth, remove the skins from the peanuts before cooking.Reheating the soup the next day will make the soup even more flavourful.Uncut and unwashed lotus roots can be wrapped in newspaper and cling wrap before storing in the refrigerator to be used later.