Preheat oven to 375 degrees F. To make croutons, spray bread cubes lightly with cooking spray, place in 15 X 10-inch jelly-roll pan.
Bake 10 to 15 minutes or until browned, stirring occasionally. Set aside.
In a small bowl, combine paprika, onion powder, garlic powder, oregano, thyme, white pepper, red pepper and black pepper. Rub on all surfaces of chicken. Broil chicken 6 inches from heat source, 7 to 8 minutes on each side or until chicken is no longer pink in center. Or, if grilling, grill chicken on covered grill over medium-hot coals 10 minutes on each side or until chicken is no longer pink in center. Cool slightly. Cut chicken into thin strips.
Combine warm chicken, greens, zucchini, cucumber, green onions, tomato and reserved croutons in large bowl.
In a small jar with tight-fitting lid, combine all dressing ingredients. Shake well and drizzle over salad.