• Fresh mint and/or fresh cilantro
Wrap the steak in plastic and place it in the freezer for 20 minutes.
Meanwhile, in a medium bowl, whisk together soy sauce, honey, Worcestershire sauce, ginger, garlic and red pepper flakes. Set aside.
Take the steak out of the freezer and slice it across the grain into 1/4-inch-thick strips.
Heat 2 teaspoons sesame oil in a 12-inch nonstick skillet over high heat. Add half of the sliced flank steak in 1 layer. Cook for 30 seconds to 1 minute or until browned on one side. Turn the steak over and cook for another 30 seconds to 1 minute or until the other side is browned. The inside should stay medium-rare. Transfer steak to a plate. Carefully wipe out the skillet with paper towels and repeat with remaining sesame oil and steak. Transfer to a plate.