If you have a few days, salt steak and place uncovered on open rack to dry out. If you don't have days, salt at least for 45 minutes.
Preheat oven to 375 degrees F.
Heat frying pan on medium to medium high heat for a few minutes. Add small amount of oil.
Heat a few more minutes.
Use paper towel to make sure steak is dry.
Add in steak. Place grill press over steak if you have one.
Turn over at 3 minutes when steak easily moves. If it's not moving easily, give it another minute.
Turn over, place in oven and cook for 5 more minutes, for rare, 7 minutes for medium rare, 9 minutes for medium. These are approximates. Use a meat thermometer to check.
Remove from oven at 135 degrees for medium rare.
If you want to add butter and thyme, add a tablespoon of butter to pan when removing from oven.
As butter melts, spoon on top of the steak.
Allow to rest for 5 to 10 minutes.