Cut the chicken breast into bite-sized pieces.
Wash the bean sprouts, bok choy, and mushrooms thoroughly and prepare them.
Add cooking oil to a pan and stir-fry the chicken breast.
When the chicken is cooked, add the bean sprouts, mushrooms, and bok choy and stir-fry together.
Season with salt and pepper.
Serve the stir-fried ingredients over rice to complete the rice bowl.