I have been making this recipe or variations of it for years. I also had the honor of winning a Taste of Home recipe contest which features my recipe in the Light and Tasty April/May 2006, issue on page 56 and in the 2007 Annual Recipes on page 98. To see how I make it, keep reading.
In a small bowl, combine the first seven ingredients. Transfer 3/4 cup marinade to a large resealable plastic bag; add garlic and sesame oil. Score surface of flank steak, making diamond shapes 1/4 in. deep; place in bag. Seal and turn to coat; refrigerate for 8 hours or overnight. Cover and refrigerate remaining marinade for basting.