Remove steak from refrigerator, pat dry with paper towel.

Generously season steak with salt and pepper and let sit at room temperature 20-30 minutes before cooking.

In heavy skillet heat olive oil

Add steak and sear on medium high heat for 4-5 minutes. Do not move steak around or you won't get a nice sear.

Using tongs turn steak, add 2 tablespoons of butter and fresh sprig of rosemary.

Ladle melted butter over steak as you sear other side for another 4-5 minutes.

Transfer pan to preheated to 350º oven to complete cooking to desired doneness.

Well cooked to desired temperature remove from skillet, cover loosely with foil and let rest 5-10 minutes.

Top with a little pat of butter before serving (optional)