Prepare rice and onion, then finely chop the onion.
Heat cooking oil in a pan and sauté the onion.
Add the rice and stir-fry evenly.
Add ketchup and stir-fry until well mixed with the rice.
Place pizza cheese on top of the rice.
Cover with a lid and cook on low heat until the cheese melts.
Serve the finished cheese ketchup rice in a bowl.