Portobello Burgers with Roasted Red Peppers, Mozzarella, and Avocado

Ingredients

• 4 portobello mushrooms
• 2 tbsp. balsamic vinegar
• 1/2 tbsp. olive oil
• 1/2 tsp. oregano
• 1/2 tsp. garlic powder
• Salt and pepper
• 1 tomato
• 4 roasted red peppers
• 4 reduced calorie hamburger rolls
• 1/2 avocado
• 1/2 red onion
• 1/2 cup basil
• 2 oz. fresh mozzarella