Cut broccoli and onion into bite-sized pieces.
Cut the chicken breast into bite-sized pieces.
Heat olive oil in a pan and stir-fry the chicken breast first.
Add the onion and broccoli, and stir-fry together.
Season with soy sauce for jangjorim or regular soy sauce.
Add rice and stir-fry evenly with the ingredients.
Taste and adjust seasoning with salt or pepper if needed.