Thinly slice the london broil (across the grain) into strips. Combine all of the marinade ingredients in a large bag or bowl. Add the strips of beef and toss to coat. Refrigerate for 8 hours, or overnight.Preheat oven to 250 degrees (F). Spread the jerky strips on cookie sheets. Place in the oven and let dry for about 6 hours. Check for doneness, they should be dark in color and completely dried out. If they are still not done, turn the oven off and leave them inside for another few hours or overnight.Store in an airtight container. I keep mine in the fridge just in case.