To make the marinade: In a small bowl mix together the marinade ingredients. Spread the mixture over both sides of the steaks and set aside for at least 20 minutes.
To cook the steak: Heat a griddle pan or barbecue until really hot. Season the steaks with salt and pepper. Then cook for about 2 minutes on each side for rare or until cooked to your liking. Timing will depend on the thickness of the steaks.
To serve: Delicious served with a salad and steamed baby potatoes tossed in herby butter. A mashed anchovy fillet mixed through the butter adds fantastic flavour.