Add all of the ingredients including the steak to a large ziplock bag or pan. Marinade for at least an hour or overnight.
When you are ready to eat remove the steak from the marinade and discard the marinade.
Preheat grill to high and spray the grill with non stick cooking spray. (It is important to make sure the grill is really hot. It's ready when the grill reaches 450-500 degrees)
Cook 3-4 minutes per side until meat is nicely charred.
Transfer steak to a cutting board and allow it to rest for 5-10 minutes. Thinly slice at an angle against the grain. Serve with Chimichurri Sauce.
Chimichurri Sauce
Add all of the ingredients to a food processor and pulse to combine. Season with salt and pepper to taste. Set aside.