In a bowl, whisk together olive oil, balsamic vinegar, Worcestershire sauce, soy sauce, mustard, garlic and salt and pepper.
Pour marinade over steak and let sit in the fridge for at least 4 hours (overnight is best).
Preheat your grill or pan to medium-high heat.
After ten minutes, place steaks on hot grill or pan.
Cook for 5-7 minutes on each side, or until they reach desired wellness.
Notes
With this quick steak marinade, you will be placing the raw meat right into the marinade before cooking it in the slightest. That being said, you will want to make sure you discard marinade that is left over in the bag. Without chancing that raw steak taste, you can always make up another bath of the steak marinade recipe, mix it with a little bit of cornstarch water slurry, and use it as a dipping sauce for extra flavor.