Trim fat from steak. Score a diamond pattern on both sides of steak. Combine steak and next 5 ingredients (steak through Worcestershire sauce) in a large heavy-duty zip-top plastic bag. Seal bag, and marinate in refrigerator 8-12 hours, turning bag occasionally. Remove steak from bag; discard marinade.
Prepare grill or broiler. Place steak on grill rack or broiler pan coated with cooking spray, and cook 7 minutes on each side or until steak is desired degree of doneness. Cut steak diagonally across the grain into thin slices. Serve steak with Horseradish Cream.