Heat peanut oil in a large skillet over medium-high heat then add in the chicken.
Cook for 2-3 minutes or until golden brown.
Add in the chopped peppers, celery, and onion. Cook for an additional 3-5 minutes or until chicken is cooked through.
Mix all sauce ingredients together in a bowl.
Transfer sauce to the skillet. Reduce heat to medium-low and simmer until sauce has thickened.
Mix! Serve over rice with chopped scallions.