Combine 2 tablespoons olive, ½ teaspoon salt, ½ teaspoon pepper, ½ tablespoon ground cumin and ½ teaspoon mustard in a small bowl, mix well. Rub the steak with the marinade and place in a large bag. Seal and refrigerate for a least 3 hours or overnight.
To prepare steak: Remove steak from marinade bag and remove as much of the marinade as possible. Discard remaining marinade. Place the steak on the preheated grill and cook 5 minutes on each side for medium doneness or cook until desired degree of doneness.
To prepare chimichurri: Place all the chimichurri ingredients in a food processor and process until smooth. Transfer to a container.
Remove from grill and allow the steak to rest for 10 minutes. Slice the steak against the grain and top with chimichurri sauce.
Notes
*This Chimichurri recipe can be adjusted to your taste. If you don't like cilantro, just replace it with fresh mint or add more parsley. If you want your chimichurri spicy, add a pinch of red pepper flakes.*Don't replace the Red wine vinegar for chimichurri.