Place the steaks in a glass dish. Whisk all of the remaining Ingredients in a separate bowl and pour over the steaks. Marinate the steaks in the refrigerator for 2 to 4 hours, turning halfway through.
Preheat the barbecue to high heat.
Sear the steaks for 4 to 5 minutes per side (for rare). Brush with the marinade while cooking.
Serve immediately with Roquefort mashed potatoes and steamed green beans.
