Cut the beef shank into bite-sized pieces.
Soak the dried seaweed in cold water for about 10 minutes, then drain.
Add sesame oil to a pot, then stir-fry the beef shank and seaweed together.
Once the beef is cooked, add water and bring to a boil.
Skim off any foam that rises to the surface.
Season with soy sauce and salt, then simmer over medium-low heat for another 30 minutes.