Grilled Balsamic Steak

Ingredients

• 1/4 cup balsamic vinegar
• 1/4 cup olive oil
• 1/4 cup soy sauce
• 1 tbsp worcestershire sauce
• 1/2 onion, chopped
• 1 tsp salt
• 1/2 tsp ground black pepper
• 1 tsp garlic powder
• 1 1/2 lb flank steak