POUR 1/4 cup dressing over steak in shallow glass dish; turn to coat both sides of steak. Refrigerate 30 min. to marinate.
HEAT oven to 400°F. Spray large ovenproof nonstick skillet with cooking spray; heat on medium-high heat. Remove steak from marinade; discard marinade. Place steak in skillet; sprinkle with pepper. Place onions around steak. Cook 3 min. or until bottom of steak is well browned. Turn steak over; turn off heat. Toss broccoli and carrots with remaining dressing. Add to skillet; mix with onions. Place skillet in oven.
BAKE 18 to 20 min. or until steak is medium doneness (160°F). Meanwhile, cook rice as directed on package.
CUT steak across the grain into thin slices. Place meat on serving plates; top with vegetable mixture. Serve with rice.