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1
Soak the bamboo or wooden skewers in cold water and refrigerate for 1 hour.
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2
Cut the steak into 24 (3 by 1-inch) strips, each weighing about 1/2-ounce.
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3
Stick a skewer into each strip lengthwise and arrange on a large platter or baking pan.
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4
Refrigerate until needed.
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5
Prepare the marinade: In a small bowl, combine all the marinade ingredients and pour over the meat, turning to coat all sides.
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6
Let marinate at room temperature for about 15 minutes.
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7
Preheat the grill or broiler while the steak is marinating.
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8
Prepare the sauce: In a small skillet, melt 2 tablespoons butter.
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9
Add the garlic and green onion and saute over medium-high heat until soft, about 2 minutes.
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10
Pour in the hoisin sauce, soy sauce and chili pepper flakes and cook 1 or 2 minutes longer.
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11
Strain into a clean pan and whisk in the remaining 4 tablespoons butter.
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12
Keep warm.
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13
Arrange 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.
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14
Grill until medium rare, about 30 to 40 seconds each side.
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15
Pour the sauce into a small bowl and set in the center of a large serving platter.
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16
Arrange the skewers around the bowl and serve immediately.
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17
*Bring your broiler tray directly under the flame for best results.