Marinate chicken in Mrs. Dash® Steakhouse Marinade. Remove chicken from marinade and discard the marinade. Heat a large non-stick skillet coated with cooking spray over medium high heat. Add chicken; cook 4 minutes stirring occasionally. Add corn and tomatoes; continue cooking until chicken is cooked through, about 4 more minutes. Meanwhile, preheat broiler. Arrange tortillas on a large baking sheet or two cookie sheets. Spray lightly with cooking spray. Broil 5-6 inches from heat source until golden brown, 2-3 minutes. Turn tortillas over; top with chicken mixture, spreading to edges. Sprinkle cheese over tortillas. Broil until cheese melts, 2-3 minutes. Top with cilantro, if desired. Fold quesadillas in half; cut each in half to serve.