Soak the seaweed in cold water for 10 minutes.
Rinse the soaked seaweed in water and drain well.
Cut the beef into bite-sized pieces.
Heat sesame oil in a pot and sauté the beef.
When the beef is cooked, add the seaweed and stir-fry together.
Pour in water and bring to a boil.
Season with soy sauce and salt to taste.
Simmer over medium heat for 20 minutes.