Soak the seaweed in cold water for about 10 minutes, then drain.
Cut the beef into bite-sized pieces.
Heat sesame oil in a pot and stir-fry the beef.
Add the soaked seaweed and stir-fry together.
Pour in water and bring to a boil.
Remove any foam that forms once it boils.
Season with soy sauce for soup and salt.
Simmer for about 10 more minutes to finish.