You can also add herbs like rosemary and thyme to the butter for extra flavour if you like. A pinch of chili flakes or some crushed chili paste makes a great spicy version too. Add chipotle powder or chopped jalapeño peppers for a southwestern version that's delicious too. You can also prepare this recipe on an outdoor gas grill. Just have one side on high heat to sear the meat, then instead of placing in the oven, place the steak on the other side of the grill with the burner turned off. Keep the burner on the opposite side on high and close the lid for 10-15 minutes or longer until your steak is cooked to your liking. Use a meat thermometer for most accurate cooking results for steak. Internal temperature for rare is about 50 degrees C (120 to 125 degrees F), for medium rare 55 degrees C (130 to 135 degrees F) and well done should not surpass 70 degrees C (160 degrees F). It is always important to rest the steaks for 10 minutes under a loose tent of aluminum foil before serving. This allows for residual cooking and for the natural juices to settle back into the meat.