Dice the tofu and Yuji into cubes.
Finely chop onion, red chili pepper, and green onion.
Heat oil in a pan and sauté the green onion and onion.
Add the tofu and Yuji, and stir-fry over medium heat.
Add chili oil, soy sauce, minced garlic, and red pepper powder to season.
Add the red chili pepper and quickly mix, then turn off the heat.
Serve the stir-fried mixture over rice and sprinkle with sesame seeds to finish.