Cut the chicken breast into bite-sized pieces.
Finely chop the kimchi and onion.
Heat olive oil in a pan and stir-fry the chicken breast.
Once the chicken is cooked, add the kimchi and onion and stir-fry together.
Add rice and mix everything well while stir-frying.
Season with soy sauce, sesame oil, and pepper.
Transfer to a bowl and sprinkle with sesame seeds.