In a medium bowl, mix the first 8 ingredients (garlic through salt and pepper).
In a large re-sealable bag, place the London broil and the contents of the bowl. Seal bag and refrigerate for at least 1 hour.
Heat grill to medium high heat.
Place meat on the and cook for 5 minutes on each side, until meat reaches desired level of doneness.
Allow meat to cool, then slice and serve warm.