Heavily season the porterhouse steak with salt. Place the salted steak on a wire rack and put in the fridge or dry ager for an hour or overnight if possible.
When ready, remove the steak from the fridge and let it rest at room temperature for an hour.
Preheat the pizza oven to a very high heat of 850 degrees Fahrenheit. Use a broiler if you do not have a pizza oven style grill.
Coat the steak on both sides with olive oil, place it back on the wire rack and slide it in the pizza oven.
Sear the steak for 2 minutes on each side, rotating halfway through, to get an even cook.
Remove the steak from the pizza oven and cut off the strip and fillet steaks from the bone. Cut each one into thick slices and arrange them on a cast iron skillet around the bone.
Melt the butter or ghee and pour it over the steak slices. Place the skillet back in the pizza oven and cook for 2 minutes, or until the steak is done to your liking.
Remove the skillet from the pizza oven, let it rest for a few minutes and serve!
Notes
Use coarse sea salt and not table salt when dry brining.
Do not overcook the steak. A perfect medium rare at 130 degrees internal temperature is ideal.