Balsamic-Marinated Flank Steak

step 1 POUR dressing over steak in shallow dish; turn to coat both sides of steak. Refrigerate 3 hours to marinate, turning occasionally.

step 2 HEAT grill to medium-high heat. Remove steak from marinade; discard marinade. Grill steak 5 min. on each side or until medium doneness. Remove from grill; cover.

step 3 LET stand 5 min. Cut steak diagonally across the grain into thin slices.