Remove excess moisture from the tofu and tuna, then cut into bite-sized pieces.
Finely chop the onion and green onion.
Heat a little cooking oil in a pan, then sauté the chopped onion and green onion.
Add the tofu and tuna, then stir-fry with gochujang, soy sauce, and chili powder.
Place the stir-fried tofu and tuna mixture on top of the rice.
Sprinkle seaweed flakes and sesame seeds to taste.