Cut the beef and radish into bite-sized pieces.
Add sesame oil to a pot and sauté the beef.
When the beef starts to cook, add the radish and stir-fry together.
Pour in water and bring to a boil.
When the soup boils, season with soy sauce and minced garlic.
Once the radish becomes translucent, add green onion and simmer for a bit longer.
Finish with black pepper to taste.