Slice the radish thinly and cut the beef into bite-sized pieces.
Put the beef in a pot and stir-fry until the blood disappears.
Add the radish and stir-fry together.
Pour in water (or broth) and bring to a boil.
Season with soy sauce for soup, minced garlic, salt, etc.
Simmer over medium heat until the radish is cooked, then add green onion to finish.