Mix all marinade ingredients, except chili flakes,  in a large ziplock bag.  Add whole flanken and marinate for at least 4 hours or overnight.

Heat a grill or broiler over high. Place flanken on pan or grill and sprinkle with red chile powder.  Grill or broil short ribs about 7 minutes on each side, being careful not to let it burn.  Cut the ribs into pieces and make sure it is cooked through.  You do want it to be rare, but not raw.  Continue to cook, turning regularly until desired doneness.

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