Apron Strings blog did a great article about the merit of marinades using lime zest as opposed to lime juice. For an interesting read see here: http://www.apronstringsblog.com/the-most-flavorful-fajitas-ever-flanks-steak-or-chicken-breast/ . This makes enough marinade for 1 1/2 pounds chicken or flank steak. This same marinade may, also, be used to marinade the accompanying onions and sweet peppers. Time includes just prep time to make the marinade.