Bring your steak to room temperature.
Heat your skillet to high. Once hot, add the olive oil and then immediately after, the steaks. Depending on thickness, cook for about 6 minutes on each side for medium. Take out of skillet and set on a plate.
Slice your onion lengthwise (see picture)
Leaving the remnants from cooking the steak, add the butter and 1 tablespoon of olive oil. Once the butter is melted down, add to the skillet. Cook until caramelized and brown. If you are stopping here, then top steak with onions and enjoy! You can also set the onions aside and proceed if you are making the gravy sauce and add the onions to a separate potion.
Once brown, add the garlic and stir to mix through.
If you are stopping here, then top steak with onions and enjoy! You can also set the onions aside and proceed if you are making the gravy sauce and add the onions to a separate potion.
To the skillet, add the soups, chicken stock, and half and half. I find it easier to mix together if you mix all of these things in a bowl before adding to the skillet, but either works.
Let everything warm through and then add the fresh thyme. Salt and pepper to taste.
At this point, I usually portion out some of the gravy/sauce for my kids, then I put the caramelized onions back in. You can also slice up the steak and mix that in or set the steaks in the gravy sauce.