Finely chop the onion, carrot, and green onion.
Heat cooking oil in a pan and sauté the onion, carrot, and green onion.
When the vegetables are slightly cooked, add canned tuna and stir-fry.
Add rice and stir-fry until everything is evenly mixed.
Season with soy sauce and salt.
Mix well until everything is combined and the dish is done.