Preheat the oven to 425F and place a skillet in the oven as it heats up. Season the steak with kosher salt all over, and let it sit at room temperature so the salt seasons the meat from the inside out.

Once the oven is at 425F, keep the skillet in there for another 5 minutes to make sure it’s really hot.

Transfer the skillet to the medium-high flame and sear the steak on each side for 2 minutes, to get some good color on each side.

Add in the butter and chopped rosemary, and spoon over the steak as it cooks. Lower the heat and cook for another 4 minutes each side until it’s 130F internally.

Enjoy!