Put all of the marinade ingredients in a food processor and give several pulses till marinade is smooth.

Pour marinade into ziploc bag with steak and onions.

Gently massage the meat to ensure the marinade coats everything. Refrigerate overnight.

Heat oil in a pan over high heat. Add meat shaking off excess marinade and cook until cooked through. You may want to drain liquid halfway through to make the crisp edges of meat.

Serve on lettuce with peppers and carrots on top.