Finely chop the chicken breast, onion, and kimchi.
Heat some cooking oil in a pan and stir-fry the chopped chicken breast.
Add the onion and kimchi and stir-fry together.
Add the rice and stir-fry, mixing well.
Add a little soy sauce to season.
Before turning off the heat, place cheese on top, cover with a lid, and let the cheese melt.
Serve the finished fried rice in a bowl.