White radish and carrot are two common ingredients for soups, but the combination could become boring. I love adding dried oysters to the soup as the oysters lend the unmistaken briny sweet taste to the soup. (Do take note that dried oysters are different from dried mussels, which are a lot cheaper).
White radish is also extremely cooling and nourishing. Boil a big pot and serve this soup for both lunch and dinner as the flavour continues to develop through the day!