1. Heat a large nonstick skillet over medium-high heat. Coat pan with cooking spray. Add chicken, pepper, and salt to pan; cook for 3 minutes, stirring to crumble. Stir in onion and next 5 ingredients (through olives); cook for 3 minutes or until chicken is done. Stir in cheese and juice. Spoon 1/4 cup chicken mixture into each lettuce leaf.