Cut the chicken breast into bite-sized pieces.
Slice the onion and green onion thinly.
Heat olive oil in a pan and stir-fry the chicken breast.
When the chicken is cooked, add the onion and green onion and stir-fry together.
Season with soy sauce, oyster sauce, and pepper.
Place the stir-fried ingredients on top of the rice.
Sprinkle sesame seeds and seaweed flakes on top as desired to finish.