Cut the chicken breast into bite-sized pieces.
Finely chop the onion and kimchi.
Heat cooking oil in a pan, then stir-fry the chicken breast.
When the chicken breast is cooked, add onion and kimchi and stir-fry together.
Add the rice and stir-fry, mixing well with the other ingredients.
Season with soy sauce and black pepper.
After everything is mixed and stir-fried, serve in a bowl.