STEP #1: The evening before I cooked the steak I marinated it in seasoning and soy sauce. Shan said that soy sauce (despite the fact that I absolutely detest it...she remembered that and pointed it out) is an excellent marinade for steak. It helps to season it, tenderize it and keep it nice and juicy... just the way we all like it!! In the past, I've used (with her approval) italian dressing, A-1 steak sauce and teriyaki marinade to marinade my steak. After I work the marinade in and add the seasonings of choice I seal the steak up in a freezer lock back and stick it back in the fridge.
STEP #2: Add olive oil (which I cook everything in and guess what, so does Shan. Duh Winning!!) to a pan and heat before adding steak to the pan to cook. I cook it til it's brown on both sides and maybe add a little more seasoning if you would like. I prefer medium-well b/c well is just too dry and boring and for medium is a little too pink so I like the in between thang!
I hate onions. Omg, I hate them things. But they are great to cook with (so they say, but since I'm no pro I follow the rules). I have learned that scallions are equally great to cook with without the strong taste of onion that I don't like. I went with the onion this time. I wanted the authentic steakhouse taste although I remove the onions before eating it.
My choice of seasonings and additives... I'm still an old school A1 girl. I'm not a big deal steak eater so this makes things nice and happy for me. :-) Real steak eaters don't need it. I also am addicted to white wine and lemon for cooking, especially for veggies and sauteed foods. I love it. I added them both to my asparagus for extra flavor.