In an earthenware pot or sauce pan, add sesame oil, gochugaru, garlic, and light colored parts of the green onions. Open the fire and sauté for 1-2 minutes. Stir as necessary and see to it the gochugaru is not burned.
Add the kimchi to the mixture and sauté for 1 minute.
Pour in the water, kimchi juice, followed by soy sauce and fish sauce. Let it boil.
Add the frozen dumplings and return to boil. Then, add the soft tofu and break it down in chunks but not too small, though. Allow to boil
Taste the soup and adjust seasoning. Add salt or more fish sauce if it's bland.
Top the soup with green onions. Crack the egg onto the soup. Cook for 1-2 minutes, or to your preferred doneness. Add some freshly ground black pepper.
Serve with steamed rice.