Cut the chicken into bite-sized pieces.
Slice the onion and bell pepper into thin strips.
Season the chicken with salt and pepper.
Heat cooking oil in a pan and sauté the chicken.
When the chicken is partially cooked, add the vegetables and stir-fry together.
Add pizza sauce and mix well.
Generously top with mozzarella cheese.
Cover with a lid and steam over low heat until the cheese melts.
Finish with a sprinkle of parsley powder.