DO-AHEAD TIP: Marinate steak overnight or for at least 5 hours (see recipe).
Prepare marinade: In a large bowl, whisk together all ingredients except steak. Place steak in a large zipper-topped plastic bag and pour marinade on top; seal bag and refrigerate overnight or for at least 5 hours.
Preheat outdoor grill to MEDIUM-HIGH. Grill steak for 3 to 6 minutes per side or until the desired level of doneness is reached.
Transfer steak to a cutting board and allow it to rest for 10 minutes.
Thinly slice steak across the grain (diagonally) and serve.
Notes
SERVING SUGGESTION: Steamed broccoli spears and Faux-Tay-Toes (steam cauliflower till tender; drain; mash with a little ghee or olive oil and salt and pepper to taste till you get a mashed potatoes texture).