Trim fat from steak. Combine wine and next 5 ingredients (wine through garlic) in large zip-top plastic bag. Add steak to bag; seal. Marinate in refrigerator 2 hours, turning occasionally.
Remove from bag; discard marinade. Place steak on a grill rack coated with cooking spray; grill 8 minutes on each side or until desired degree of doneness. Place on a platter; cover with foil. Let stand 5 minutes. Cut diagonally across grain into thin slices. Serve with Red Onion-Garlic Marmalade. Garnish with lavender sprigs, if desired.