Soak the dried seaweed in cold water for about 10 minutes.
Cut the soaked seaweed into bite-sized pieces.
Thinly slice the beef.
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 soy sauce, salt, and other seasonings as desired.
Skim off any foam and simmer for another 10 minutes.