Shred the cabbage and finely chop the onion.
Heat sesame oil in a pan and sauté minced garlic.
Add the onion and cabbage, and stir-fry.
Add tuna and continue stir-frying together.
Season with chili powder and soy sauce.
Add rice and stir-fry well with all the ingredients.
Slice the Cheongyang chili and add it to the pan, then stir-fry.
Finish by sprinkling black pepper.