Soak pork bone in cold water for 1-2hours. Rinse and Drain
Bring 8 cups of water to boil then add pork bone with bay leaves and white wine. Boil for 6-7min, then rinse and drain.
In a large stock pot, add 12 cups of water. Add bones, garlic, ginger and peppercorn. Bring to boil and simmer in medium heat for 45min.
Prep and chop the veggies and make the spicy sauce. Marinate the beef in the spicy sauce and let it sit to marinate.
When the 45min is done, skim the fat on top of the soup and take out aromatics.
Add potatoes, onion, napa cabbage, marinated beef. Bring for boil and simmer in med heat for 30 min.
Go to next step if using perilla seeds. Add the bag of perilla seed and stem and simmer for 5 min.
Turn heat off and sprinkle scallion, and serrano pepper. Serve with plenty of perilla seeds and fresh chopped perilla leaf on top.