Combine the olive oil, dry sherry, soy sauce, honey, garlic and red pepper in a zip top plastic bag (or shallow baking dish). Place steak in bag and let marinate on counter top for 30 minutes.*
Preheat grill to high heat (at least 500 degrees or higher if possible), clean grates and brush with oil if needed.
Remove steak from marinade (discard any remaining marinade) and sear on the hot grill for 3 to 4 minutes per side, until the steak reaches an internal temperature of 130 degrees F. Let rest for 5 minutes before slicing the steak AGAINST the grain into thin strips. Serve with the chimichurri sauce if desired.
*If marinating the steak longer than 30 minutes, keep in refrigerator. Remove from refrigerator at least 30 minutes prior to grilling.Serving size is 3oz. of steakChimichurri sauce is not calculated in nutrition facts.