Cut the chicken breast, Spam, onion, and mushrooms into bite-sized pieces.
Add cooking oil to a pan and stir-fry the onion first.
Add the chicken breast and Spam and continue stir-frying.
Add the mushrooms and stir-fry again.
Add rice, mixing well with all the ingredients.
Season with soy sauce and black pepper to taste.
Transfer the finished fried rice to a bowl.