Ingredients
1 tablespoon red wine vinegar
1 tablespoon balsamic vinegar
2 tablespoons lemon juice
2 tablespoons Dijon mustard
1 tablespoon Worcestershire sauce
1/2 tablespoon soy sauce
1/3 cup olive oil
1/2 teaspoon oregano
1/2 teaspoon basil
1/2 teaspoon thyme
2 teaspoons garlic powder

Instructions
1. Combine all ingredients in a shallow sealable container or ziptop bag. 



Comments
This marinade recipe is from food.com and I used it for a 1-2 pound London broil.  I marinated it for somewhere between 12 and 24 hours, then Art grilled it until it was perfect.  The marinade was delicious, the meat was super tender, there was a ton of flavor and we had a hard time not eating the entire broil in one sitting. 

Shown here with Sweet Onion Pie.