Heat 2 tbsp of cooking oil in a pot over low heat. Sauté the green onion and minced garlic until fragrant.
Once the green onion oil is released, add 1 tbsp chili powder and 1 more tbsp cooking oil. Continue cooking over low heat to make chili oil. Be careful not to burn it.
Add the sliced onion and soy sauce. Stir-fry until the onion becomes slightly translucent.
Then add shrimp and clams and stir-fry briefly.
Pour in enough water to cover the ingredients and bring to a boil over high heat.
Add tuna extract fish sauce, anchovy dashida, beef dashida, and MSG. Let it boil.
Add the soft tofu and roughly break it with a spoon.Note: Tofu releases water, so the stew may taste mild. Adjust with a little salt if needed.
Turn off the heat and crack a raw egg on top.
Before serving, mix gently while the broth is hot to let the egg cook naturally.