Marinade (marinate the steak the night before if possible)
Mix all the ingredients together then pour into a zip lock bag or a dish with sides, add the steak and marinade in a fridge, the evening before or at least 2 hrs.
Once marinated drain away excess juices, pat dry, and bring to room temperature.
To cook your steak:Take a large frying pan and place on high heat. Make sure the pan is hot, then add a little oil.Sear the steak on both sides to get a nice brown crust, then reduce to medium heat.Cook each side for approx. 4 mins, basting it with foaming butter.
If you have a meat thermometer, aim for an internal temperature of 50 C before resting.Rest for 5 - 10 mins, then slice against the grain.Serving suggestion: Serve with chips and garden peas