Cut the cabbage, chicken breast, and onion into bite-sized pieces.
Add cooking oil to a pan and stir-fry the chicken breast first until cooked through.
Add the onion and cabbage, and stir-fry together.
Add the rice and mix well with the other ingredients as you stir-fry.
Season with salt, pepper, and soy sauce.
Mix everything well while stir-frying, then serve on a plate.