Prepare the marinade: In a small bowl, combine all the marinade ingredients and pour over the meat, turning to coat all sides. Let marinate at room temperature for about 15 minutes.
04Preheat the grill or broiler while the steak is marinating.05Prepare the sauce: In a small skillet, melt 2 tablespoons butter. Add the garlic and green onion and saute over medium-high heat until soft, about 2 minutes. Pour in the hoisin sauce, soy sauce and chili pepper flakes and cook 1 or 2 minutes longer. Strain into a clean pan and whisk in the remaining 4 tablespoons butter. Keep warm.06Arrange the steak skewers on the grill or under the broiler,* being careful that the bare ends of the skewers are not directly over (or under) the flame. Grill until medium rare, about 30 to 40 seconds each side.07Pour the sauce into a small bowl and set in the center of a large serving platter. Arrange the skewers around the bowl and serve immediately.08*Bring your broiler tray directly under the flame for best results.