Begin by placing the cooked chicken in the oil using a large skillet. Add in the veggies and let this simmer for 10 minutes or until the onions are slightly browned.
Next add in the rice and 2 Tbsp soy sauce. Continue cooking for another 10 minutes then add in the beaten egg. Stir the egg in and continue cooking for an additional 5 minutes.
At this point if you want it darker in color add in the remaining soy sauce.