Heat one tablespoon of oil in a skillet or pan over medium-high heat.
Add the onion and sauté for 2 minutes until translucent and soft.⏱ 2 min
Add the chicken and cook for 1 minute just to warm through.⏱ 1 min
Move ingredients to the side, add the remaining oil, and tip in the rice.
Fry the rice, stirring constantly for 3 minutes until slightly toasted and hot.⏱ 3 min
Pour the soy sauce over the rice and toss everything together for 1 minute.⏱ 1 min
Melt the butter in a pan over medium heat.
Add the onion chunks and cook for 5-7 minutes until they are golden brown and sweet.⏱ 7 min
Add the diced chicken and cook for 2 minutes until the edges start to crisp.⏱ 2 min
Stir in the cooked rice and mix well so it coats in the buttery onion juices.
Season generously with pepper and cook for 3-4 minutes, stirring occasionally until the rice is hot.⏱ 4 min
Place the water, soy sauce, and sugar in a small saucepan over medium heat.
Add the sliced onions to the liquid and simmer for 3 minutes until they soften.⏱ 3 min
Add the chicken slices and heat through for 1-2 minutes until warmed by the sauce.⏱ 2 min
Prepare a bowl with the warm rice as the base.
Carefully pour the chicken, onion, and remaining sauce mixture over the top of the rice.