The marinade helps keep these steaks super juicy, no matter which temperature you cook them to, so it's tough to mess this one up, even if you're a novice griller. I cooked my steak for about 5 minutes per side and it was medium well (see photos), but still super juicy. For the most accurate doneness, get yourself a meat thermometer for a grill. It will have a long handle, so you don't burn yourself when checking the temperature. For medium rare, remove the steak from the grill as soon as it reaches 135ºF, 145ºF for medium, 150ºF for medium well, and 160ºF for well done. Be sure to let the steak rest for at least 5 minutes before slicing, for optimal juiciness, as well.