Original from: www.foodnetwork.com/recipes/grilled-marinated-london-broil-recipe.html
Ingredients
5 large garlic cloves
1 teaspoon salt
1/4 cup dry red wine
1/4 cup balsamic vinegar
1 tablespoon soy sauce
1 teaspoon honey
1 1/2 pounds top-round London broil
Directions
Mince the garlic to a paste with salt and in a blender blend with the salt, red wine, balsamic vinegar, soy sauce and honey.
In a heavy-duty sealable plastic bag, combine London broil with marinade. Seal bag, pressing out excess air, and put in a shallow baking dish. Marinate steak, chilled, turning occasionally, at least 4 hours and up to 24.
Bring steak to room temperature before grilling. Remove steak from marinade, letting excess drip off, and grill on an oiled rack set 5 to 6 inches over glowing coals, 7 to 9 minutes on each side for medium-rare. Transfer steak to a cutting board and let stand 10 minutes.
Holding a knife at a 45-degree angle, cut steak across grain into thin slices and serve with tomatoes.
Alternate marinade:
Ingredients
1 (2 1/2 pound) tri-tip London Broil or flank steak
1/4 cup red wine vinegar
1/4 cup dry red wine
2 tablespoon olive oil
2 tablespoons Worcestershire sauce
2 tablespoons soy sauce
2 tablespoon Creole mustard, or other spicy whole-grain mustard
1 tablespoon Essence, recipe follows
1 teaspoon coarsely ground black pepper
4 cloves garlic, smashed
Essence (Emeril’s Creole Seasoning):
2 1/2 tablespoons paprika
2 tablespoons salt
2 tablespoons garlic powder
1 tablespoon black pepper
1 tablespoon onion powder
1 tablespoon cayenne pepper
1 tablespoon dried leaf oregano
1 tablespoon dried thyme