Combine above ingredients in gallon size bag (or shallow dish)
Refrigerate for 1 hour to overnight.
Heat grill to high,
Quickly grill beef on hot grill till slightly charred and cooked through on both sides. About 2-4 minutes per side.
Notes
*while flank steak is a good cut, it is also pricey. feel free to browse your steak section and get a 1 lb steak that looks good for a lesser price tag