Mix all the ingredients well and place in a resealable plastic bag or glass container. Add steak and toss to coat. Marinate in the refrigerator for at least 1 hour, up to overnight.
Remove steaks and discard remaining marinade. Grill steaks to preferred doneness.
Other ideas: This marinade works for poultry or vegetables, or try mixing in with ground beef for burgers.
Adapted from "The Olive Oil & Vinegar Lover's Cookbook" by Emily Lycopolus