Soak the seaweed in cold water for about 10 minutes.
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.
Season with soup soy sauce and salt.
Once it boils, skim off the foam and simmer for another 10 minutes to finish.