Cut the chicken breast into bite-sized pieces.
Thinly slice the onion and bell pepper.
Heat olive oil in a pan and stir-fry the chicken breast.
When the chicken is halfway cooked, add the onion and bell pepper and stir-fry together.
Season with low-sugar gochujang and soy sauce.
When all the ingredients are cooked, sprinkle sesame seeds on top to finish.