Combine scallions and next 7 ingredients in a large resealable plastic bag and mix well.
Add steak; seal bag, pressing out excess air. Turn steak to coat. Refrigerate overnight, turning bag occasionally.
Build med hot fire. Remove steak from bag and wipe off excess marinade. Season both sides lighltly with salt.
Grill until well browned about 6 min per side for med rare. Transfer to cutting board and let rest 10 minutes. Slice against the grain
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