Marinade:
1/4C Red wine vinegar
1/4C red wine
2T oil
2T worcester sauce
2T Soy sauce
2T Mustard
4 cloves garlic minced or crushed.

Lightly score the london broil and then rub marinade in and leave it for
several hours to overnight.

On high heat (grill, broiler, or pan) cook for 5-8 minutes a side.

Let rest. If you used a pan, make a pan sauce now.

Slice thinly across the grain.