Soak dried seaweed in cold water for 10 minutes.
Cut the soaked seaweed into bite-sized pieces.
Cut beef into bite-sized pieces and season with soy sauce and sesame oil.
Heat sesame oil in a pot and stir-fry the beef.
Add the seaweed and stir-fry together.
Pour in water and bring to a boil.
Season with soup soy sauce.
Simmer on medium-low heat for 15 minutes.