Cut the chicken and tomato into bite-sized pieces.
Finely chop the onion and garlic.
Add cooking oil to a pan and sauté the garlic and onion.
Add the chicken and cook until done.
Add the tomato and stir-fry a bit more.
Place the cooked ingredients on top of the rice.
Drizzle sauce (such as tomato sauce or teriyaki) over the top.