Heat the sesame oil in a hot pot over medium heat. Add the onion and cook until it’s coated with the oil.
Add the kimchi and stir fry with the onion and Tokyo negi.
Add sake and gochujang.
Add gochugaru and granulated sugar. Mix all together well.
Add the stock, and cover the lid to bring to simmer.
Once simmering, lower the heat to medium low heat. Add soy sauce and miso. Taste the soup and adjust the taste by adding salt, if necessary.
Add the hard vegetables to the soup first, such daikon, carrot, tough part of napa cabbages, etc. Cook covered for 10 minutes on low heat.
Skim off the foam and fat. Add the soft ingredients such as leafy part of napa cabbages, mushrooms, and tofu.
Add the gyoza (if frozen, no need to defrost) and garlic chives on top.
Cook covered over medium low heat for 5 minutes. Serve the extra ingredients on a plate and add them once you finish the ingredients in the pot.
DONE!