Portobello Mushroom Burger

Bahan-bahan (2 porsi)

• 2 tablespoons low-sodium soy sauce
• 2 tablespoons balsamic vinegar
• 1 tablespoon extra-virgin olive oil
• 3 cloves garlic (minced)
• 1 ½ teaspoons Italian seasoning
• ½ teaspoon ground black pepper
• 4 portobello mushroom caps (cleaned with underside stems and gills removed)
• 4 thin slices havarti cheese (or swap provolone or baby Swiss)
• Whole wheat or brioche hamburger buns
• Sliced red onions
• Pesto
• Sliced tomato
• Arugula