Cut the chicken breast into bite-sized pieces.
Slice the onion and bell pepper thinly.
Heat olive oil in a pan and sauté the chicken breast.
When the chicken is halfway cooked, add the onion and bell pepper and stir-fry together.
Add rice and mix everything well while stir-frying.
Season with salt and pepper to taste.
Turn off the heat and add cheddar cheese and mozzarella cheese on top.
Cover and wait until the cheese melts.