Preheat oven to 350℉.
Place packaged steaks in bowl with cool running water while you cut your vegetable.
Preheat oven safe pan on stove top on medium-high heat.
Remove steaks from package, pat dry and season with salt and pepper.
Sear on one side for 2 minutes.
Flip steaks and sear for 1 more minute.
Add butter and garlic, wait for butter to foam and spoon over steaks for 1 minute. Remove steaks from pan and set aside.
Add onions and mushrooms to pan and sauté for 1 minute.
Add balsamic vinegar and return steaks back to the pan on top of vegetables and place in oven.
Cook for 7-10 minutes or until steaks reach desired internal temperature. 115℉ and rising for medium-rare.
Remove steaks from pan and let rest for 5-8 minutes before slicing. While steaks are resting reduce liquid in pan by half for a delicious pan sauce. Enjoy!