Cut the chicken breast into small pieces.
Chop the onion and green onion.
Heat olive oil in a pan and stir-fry the chicken breast.
Add the chopped onion and green onion and stir-fry together.
Finely chop the kimchi, add it to the pan, and stir-fry.
Add the brown rice and mix all ingredients well while stir-frying.
Season with soy sauce and black pepper.
Once all ingredients are well mixed, remove from heat.