Portobello Mushroom Burger

Ingredients (14)

• 2 tablespoons low-sodium soy sauce
• 2 tablespoons balsamic vinegar
• 1 tablespoon extra-virgin olive oil
• 3 cloves garlic
• 1 1/2 teaspoons Italian seasoning
• 1/2 teaspoon black pepper
• 4 portobello mushroom caps
• 4 thin slices havarti cheese
• For serving:
• Whole wheat or brioche hamburger buns
• Sliced red onions
• Pesto
• Sliced tomato
• Arugula