Thinly slice the onion. Shred the chicken breast and chop it finely, then use a food processor to mince it. Heat oil in a pan and sauté the onion. Mix the rice with 2 egg yolks until well combined.

When the onions are fragrant, add the minced chicken to the pan and stir-fry until dry. Add the rice and stir-fry everything together.

Season to taste, then add the egg whites and continue stir-frying until the rice is dry and glossy. Sprinkle black pepper on top before serving.