All steak must be eaten rare, or raw.
Get a fine cut of meat (filet is perfect for this) and shave it very thinly. Dice some tomatoes and add minced garlic, chopped onion and a bit of thyme. Bake some garlic bread until it is about the same texture as a crouton. Take a crouton, add some of the thinly sliced steak (which is raw), top with the tomato-onion paste and a little mustard or horseradish sauce. Makes a great appetizer.
When I cook a filet, there are very few, if any, seasonings on it. Sear it over extremely high heat for no more than 60 seconds. Have a platter heating in the oven so that it is about 400 degrees. Pull the platter out of the oven and put about an eigth of a stick of butter on it. Place your filet on top and serve.
For a good sirloin, season it with a nice rubbing of fresh cracked black pepper and kosher salt. Add a bit of garlic to taste.
Another good sirloin recipe is to take some brown sugar, molasses, touch of vanilla and some of your favorite bourbon (Basil Hayden works well...or Jack Daniels). Mix the sauce up and marinate your steak in it for at least 4 hours. Overnight works best. Grill that baby over an open fire (mesquite adds a very nice touch).
For a strip, get nothing less than an aged KC. Nebraska beef is good, but KC is in a class by itself. Like a filet, this steak can be eaten with little to no seasoning. Maybe a red wine reduction sauce, or a touch of cracked pepper.