In cast iron pan, add enough oil to cover bottom of pan. Turn on to medium high and let heat. Add 4 tablespoons of butter. Add the beef to pan and sear (about 1 or 2 minutes depending on how you like your steak cooked - I like mine medium), turn meat over and repeat until all meat is seared. Do not crowd meat or you won't get a nice sear. As meat is cooked, place in large bowl and salt lightly.