Grilled Beef and Vegetable Skewers

Ingredients

• 1/3 cup balsamic vinegar
• 1/4 cup soy sauce
• 3 tablespoons Worcestershire sauce
• 2 tablespoons virgin olive oil
• 2 teaspoons dried rosemary
• 3 cloves minced garlic
• 2 teaspoons Dijon mustard
• 1 teaspoon pepper
• 1/4 teaspoon onion powder
• 1 pound tri-tip steaks cut into 1-inch pieces
• 8 ounces sliced white mushrooms
• 2 bell peppers cut into 1-inch pieces (any color peppers)
• 1 large red onion cut into 1-inch pieces
• 2 tablespoons olive oil
• salt
• pepper
• chopped fresh parsley to garnish (optional)