I boiled some petite golden potatoes in salted water until fork tender. This took about 30 minutes then I gently smashed on an oiled baking sheet with the bottom of a cup. Then I prepared a mixture of butter, garlic, and parsley to spread over the top of each potato. Next, I added some salt and pepper to each one before putting them in the oven for 10 minutes at 400 degrees Fahrenheit on the broil setting. For the steak, I used a filet mignon cut which I seasoned with salt and pepper. If you want more seasoning, obviously, do it how you like. I placed it in a medium/hot cast iron skillet on the fat side first for 20 seconds. Then, I cooked both sides for 2 minutes. I took the potatoes out of the oven but if you want them crispier, just leave them in the oven longer. I added parmesan cheese and popped them back in the oven for another 5 minutes.
Back to the steak, I'm adding thyme, garlic, and butter. I basted it for two minutes on each side and it goes into the oven for 5 1/2 minutes at 415 degrees. This is where I overcooked my steak. Misjudged the timing on the potatoes, so the steak was in the skillet for a while longer than it should have been before I put it in the oven. This was closer to a medium steak than a medium-rare that I like. Next, you can add more salt and parsley to the potatoes to taste. I let the steak rest for 8 minutes before cutting into it. And, that's it!