These are my daughter’s favorite thing to eat for dinner, and she is a very picky eater. It always seems I have to taste test (my excuse) these right off the grill. They are that good that you just can't wait to eat them. I use -Mr. Yoshida's original gourmet sweet & savory marinade and cooking sauce- for the marinade. It’s not just great on flank either. I am going to add another recipe that I use with that stuff soon. The only place I have found it is at Costco. It’s definitely a must have in this house. Another good marinade sauce is Kikkoman teriyaki with green onions and garlic. They also have a ginger one. Yum!