Mix all marinade ingredients together. Lightly score meat in a diamond pattern on each side. Place meat in a resealable bag. Pour in marinade. Squish meat and marinade around to get all the nooks and crannies. Marinate in refrigerator 2-3 hours or up to 24 hours, rotating occasionally. Can be frozen in the marinade too (see "For Camping" for how I do this). 20-30 minutes before cooking take meat out of the refrigerator to come up in temperature. Cook in the broiler or on the grill on high heat for 5-7 minutes per side depending on thickness and desired doneness. I have been asked about roasting temperatures, I have never done this, always grill or broil. **For camping - Place the fresh London broil and marinade in a zipperbag, squeeze out as much air as possible, seal, place inside a vacuum pack bag. Vacuum pack and freeze (I like to vacuum pack the zipper back to guard against leaks in the cooler). Put frozen in the camping cooler, after a day or two it is defrosted and can be cooked on the grill with minimal preparation and mess.**.