Cut the chicken breast into bite-sized pieces.
Chop the onion and garlic.
Heat olive oil in a pan and sauté the chicken breast.
Add the chopped onion and garlic, and cook together.
Add tomato (or tomato sauce) and bring to a simmer.
Add rice (or cooked rice) and stir over medium heat until combined and simmering.
Season with salt and pepper.
Top with cheese and parsley to finish.