1. Process all ingredients for the dip in a food process or blender until smooth. Transfer to a saucepan; boil 5 minute Cool to room temperature. 2. Slice flank steak across the grain into 16 strips about ½” thick. Pound each to about 1/8” thickness, then season with salt and pepper. 3. Place 1 asparagus spear and 1 scallion across the short end of a strip of beef. Roll beef around vegetables, secure with a toothpick and place on a shallow baking sheet; roll remaining beef and vegetables. 4. Combine remaining ingredients, pour over beef, and marinate 10 minute Preheat broiler to high. 5. Broil steak rolls 5 minute Remove from pan, tent with foil to keep warm, and strain marinade into a saucepan. 6. Boil marinade until syrupy, about 5 minute Remove toothpicks from steak rolls and top with glaze. Serve with vinegar dip. ---------------------------------------------------------------------------
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