Cut the chicken breast into bite-sized pieces.
Julienne the onion and bell pepper.
Heat olive oil in a pan and stir-fry the chicken breast.
When the chicken is half cooked, add the vegetables and stir-fry together.
Season with soy sauce, sesame oil, and minced garlic.
Place the stir-fried ingredients over rice.
Sprinkle sesame seeds and pepper to taste, then serve.