Whisk together Mrs. Dash® Chicken Grilling Blend, olive oil, balsamic vinegar and maple syrup until well mixed. Place half of mixture in large plastic bag and set the other half aside. Lightly score each chicken breast 2-3 times and place in bag with mixture. Close bag and move chicken around until each piece is coated. Refrigerate at least an hour before cooking. When ready to cook, preheat barbecue to medium. Cook chicken for about 5 minutes on each side, turning once, until juices run clear. Cool slightly and cut into large strips. Meanwhile, in a large bowl or platter, toss lettuce with remaining Mrs. Dash® Chicken Grilling Blend, oil, vinegar and syrup mixture. Arrange chicken strips on top of greens and serve.