Hi! I am making London Broil tonight and have never done so before. I was just wondering what is the best way to cook it? I marinated it with worchestershire sauce and italian dressing(per hubby's request...hope it will be good

) Also, do I rinse off the marinade before cooking it, or leave it on and pour the rest in the pan with it? Oh yeah, I want to make red potatoes to have with it. Any hints?