1.) Take steak out of your fridge, pat dry with paper towels, and season with salt and pepper. Build a charcoal fire. Personally I use a charcoal chimney. A full one takes 45-60 minutes to fully ignite all the coals.
2.) spread charcoal evenly on the coal rack and put a grill grate in position. Vents should be at least 3/4 open, if not full.
3.) let grill heat up for at least five minutes, then clean with a grill brush, and oil the grate. I use a folded paper towel dipped in oil, and tongs.
4.) grill steak to desired level of doneness. It takes at least three minutes to get good grill marks, so each side will get a minimum of six minutes. That usually results in a medium rare steak, although a porterhouse like the one pictured will have very rare bits of meat by the bone. Of course if your steak is a rather thin cut, it will be more done.
5.) Place on a plate, cover loosely with foil, and let rest for 20 minutes. Not a minute less! In the meantime, you can fry some sliced mushrooms in butter (use lots, as mushrooms tend to absorb it as it fries), heat some beef broth (or mushroom broth, if available) in a saucepan, then add the mushrooms to the broth for a nice topping. Conversely, you can mix up some prepared horseradish with mayo and a bit of lemon juice. Or your favorite steak sauce. Or nothing at all - sometimes a really good steak should be consumed that way.
