ok boys and girls here it goes,it been in the restaurant business for forty years, I owned and operated six restaurants, over the years on this boards I see guys asking for London broil recipes, I'm going to give you the recipe that I used in all my restaurants, the only one you will ever need for tender and succulent meat of any kind,first the ingredients, in a container you put,
One three finger ginger root peeled and cut in to one inch cubes, you add enough DRY vermouth to cover the ginger, refrigerate until the ginger absorves the vermouth,(both should be the same color) this will take a few days, this is your base for the marinade, when this is done
And you ready to grill add a cup of the vermouth and two cubes of ginger chopped chop two gloves of garlic, a cup of olive oil, 3 soup spoons of gray poupon mustard, 1 cup of your choice regular or low salt soy sauce,(I use regular) salt and pepper, mix in a bowl, put the meat in a plastic bag add the marinade and let stand in room temp until meat becomes same color as marinade, (up to four hrs) bring grill to high heat
Place meat on grill close lid turn meat after two minutes and do the same on the other side, Lower heat and cook for four minutes on each side, turn off heat wait two minutes and remove
Tent the meat for five minutes and slice thin AGAINST THE GRAIN, enjoy!!!!!!