1In a large pot, mix 1,5l of cold water, beef and 1/2 onion and simmer on low heat for 2 hours. Mix seasoning sauce (red pepper paste, garlic, sesame salt and sesame oil) and set aside.
2Remove meat from water and shred into thick strips. Discard water and 1/2 onion.
3Mix the fernbrake and shredded beef in a bowl with the seasoning sauce.
4In the pan, combine the red pepper oil ingredients and heat over low heat for 5 minutes. Remove and set aside.
5To a deep pan add beef broth along with the mixed items in the seasoning sauce and bring to a boil.
6Add green onion slices and continue to boil for 3-5 minutes.