Grilled Steakhouse Kebabs :: The Meatwave

Ingredients

• 1/4 cup extra-virgin olive oil
• 1/4 cup Worcestershire sauce
• 3 tablespoons soy sauce
• 1 tablespoon freshly squeezed lemon juice from 1 lemon
• 1 tablespoon Dijon mustard
• 1 tablespoon minced garlic (about 3 medium cloves)
• 2 teaspoons dark brown sugar
• 2 teaspoons freshly ground black pepper
• 1 1/2 pounds beef sirloin tips, cut into 1 1/2-inch cubes
• 8 ounces cremini mushrooms, cleaned and halved
• 1 large red onion, sliced into 1 1/2-inch cubes (about 3 onion layers each)