Cut the chicken breast into bite-sized pieces.
Finely chop the onion and bell pepper.
Drizzle olive oil in a pan and stir-fry the chicken breast.
When the chicken is cooked, add the vegetables and stir-fry together.
Add rice and mix all the ingredients together while stir-frying.
Season with salt to taste.
Top with mozzarella cheese, cover with a lid, and let the cheese melt.
Transfer the finished cheesy rice to a plate.