Mike R said:
let me have the London Broil marinate recipe
This is from memory- I'll check it when I get home
1 Cup tomato juice
1 TBS fresh horseradish
2 TBS worchestershire sauce
1/4 cup dry sherry
1 tsp dry basil
1 tsp black pepper
1 1/2 pounds Skirt steak, top round, or french cut
Marinate for 30 minutes at room temp turning once or 2 hours in the fridge covered and turning 2 times. If in the fridge after 2 hours take out of the marinade and let come to room temp- grill at high heat and cook until rare/medium rare- about 7 minues per side.