1. Preheat grill to high heat.
2. Combine minced parsley, lemon rind, garlic, 1/2 teaspoon salt, and 1/2 teaspoon pepper in a small bowl. Sprinkle chicken with parsley mixture; let stand 10 minutes. Place chicken on grill rack coated with cooking spray; grill 3 minutes on each side or until chicken is done.
3. Combine juice, oil, mustard, remaining 1/4 teaspoon salt, and 1/4 teaspoon pepper in a large bowl; stir with a whisk. Add lettuce and remaining ingredients; toss to coat.