Soak the seaweed in cold water for 10 minutes, then drain.
Cut the beef into bite-sized pieces.
Add sesame oil to a pot and stir-fry the beef.
Add the soaked seaweed and stir-fry together.
Pour in 500ml of water and bring to a boil.
Skim off the foam and season with soy sauce and minced garlic.
Simmer on low heat for another 10 minutes.