Finely chop the chicken breast.
Dice the onion and bell pepper.
Heat olive oil in a pan and stir-fry the chicken breast.
Add the vegetables and stir-fry together.
Add cauliflower rice instead of regular rice and mix well.
Season with salt and pepper.
Turn off the heat and add mozzarella cheese on top.
Cover with a lid and let it sit until the cheese melts.