1. wash meat and soup bones. place in large pot with water and bring to boil. turn down heat and simmer ~2 hours, skimming foam and fat, until beef is tender.
2. remove meat from broth, cool, then cut and shred meat into ~3 in. long stips
3. wash and cut green onions into 3 in. long pieces and
4. mix together garlic, hot pepper paste, chili pepper powder, salt, black pepper, sesame oil, soy sauce, and saesame seeds into paste.
5. combine paste with shredded beef and return to broth with green onion pieces
6. bring broth with beef, green onions, and noodles back to boil, then serve hot.