Heat half the oil in a non stick frypan over high heat. Add the chicken and cook for a 1-2 minutes or until browned. Remove and set aside.
Add remaining oil to pan and stir fry onion and capsicums for a couple of minutes to soften. Pour in Chicken Tonight Sauce and bring to the boil. Return chicken to the pan and cook for a further 1-2 minutes or until chicken is cooked.
Serve immediately with tortillas and accompaniments of choice.
Chicken may substituted for 500g rump steak strips.