COOK vegetables in nonstick skillet on medium heat 1 min. Stir in steak sauce; cook 1 min. Set aside. Cut cheese slices in half.
TOP crackers with meat, cheese and vegetable mixture.
PLACE 8 topped crackers on microwaveable plate. Microwave on HIGH 20 to 25 sec. or until cheese begins to melt. Repeat with remaining crackers.