
Whisk together all marinade ingredients in a small bowl.
Pour the marinade into a gallon zip lock freezer bag. Add the steaks, seal the bag, and move them around to coat well.
Marinate for at least 3 hours, but no more than 24 hours. (More may result in mushy meat.)
Cook sirloin steaks as desired in a cast iron skillet, or cook steaks in the oven like this.