This is what we like to call cast-iron steak! Preheat a skillet over medium-high for about 5 minutes. Pat the steak dry with paper towels, then right before adding it to the skillet, season it well with kosher salt. Add the steak to the skillet and cook until the bottom side is nicely browned, flip and continue cooking to your desired doneness. (Medium-rare is between 125ºF and 130ºF.) Use this Internal Cooking Guide to help you determine your ideal internal temperature. And be sure to use a thermometer (this one is our favorite!).