Remove steaks from marinade; discard marinade. Place steaks on grill over medium heat; arrange potatoes and squash around steaks. Grill beef, covered, 11–15 minutes until desired doneness, turning occasionally. (Do not overcook steak.) Grill potatoes 13–15 minutes and squash 7– 10 minutes or until vegetables are tender and lightly browned, turning occasionally and brushing with 2 tablespoons dressing.