serves 4–6 people; marinate steak for 3 hours minimum, up to overnight in the refrigerator
Trim silverskin then place the flank steak in a rectangular dish. Mix together marinade ingredients and pour over steak. Using a fork, poke holes in the meat, turn over, and poke other side. Set aside to marinate for 3 hours or refrigerate for longer up to overnight. Occasionally turn the meat while marinating.
Allow meat to come to room temperature before cooking on a hot grill. Grill about 5 minutes per side. Let rest a few minutes before slicing thinly across the grain.