For marinade

1/3 C Dijon

1/3 C bourbon or scotch

1/4 C firmly packed brown sugar

1 small onion sliced thin

2 garlic cloves minced

1 TBLE Worcestershire sauce

1/4 C fresh lemon juice

2 TBLE olive oil

3/4 C plain yogurt

salt

about 4 lbs london broil –  2 2 lb pieces

Whisk ingredients of marinade in small bowl.   Score both sides of meat with deep slashes.  Arrange in baking dish.  Pour marinade over it. Cover and chill at least overnight. Grill meat on oiled rack… discard marinade.  Let stand 10 minutes before serving