Drizzle sesame oil into a stone pot or small pot Add the white part of the green onion and cook until fragrant.
Stir in the minced garlic and a pinch of gochugaru (Korean chili flakes). Stir quickly to prevent burning.
Add the chopped kimchi and fill the pot halfway with water. Add an anchovy tablet, or anchovy sauce/broth for depth of flavor.
Stir in soy sauce and fish sauce to taste.
Gently add tofu and vegetables. Crack the egg on top, cover, and let it cook until the egg is set to your liking.
Garnish with the green part of the green onion and enjoy your warm, comforting bowl of Kimchi Tuna Jjigae!