Heat a large non stick skillet over medium heat until hot. Add the Extra Virgin Olive Oil. Add the steaks and cook 3 to 4 minutes on each side to medium rare. Remove the steaks, season with a little salt and pepper and cover to rest. Add the mushrooms and thyme to the skillet. Cook and stir over medium heat for 3 to 5 minutes. Remove the mushrooms and cover. Add the balsamic, increase heat to medium high. Cook and stir 7 to 10 minutes or until reduced to 1/3 cup. Add the butter and mushrooms to heat through. Plate the steaks and add the mushroom/balsamic over the top. Serve with garlic mashed potatoes on the side.