Chunks of pork are boiled with salt, and cubed white radish (and, optionally, sweet corn) is added to make a deceptively simple soup that is warming and comforting.
Bring to the boil, cover and simmer for an hour or until the pork is tender. Taste occasionally, add salt if needed, and pour in more water to make sure that the pork pieces are always submerged in liquid.
Taste the broth, add more salt if needed, then add the radish (and corn, if using).
Bring to the boil, cover and simmer for another half an hour or until the radish cubes are soft.
Give the broth a final taste and add more salt, if needed, before sprinkling in the sliced scallions.