Portobello Burger

Ingredients

• Mayonnaise - To taste
• Red onion - 1 small, sliced
• Tomato - 1 large, sliced
• Lettuce - 4 leaves
• Burger buns - 4
• Salt and pepper - To taste
• Garlic - 2 cloves, minced
• Balsamic vinegar - 2 tablespoons
• Olive oil - 2 tablespoons
• Portobello mushrooms - 4 large

Instructions

1. Clean the mushrooms and remove the stems. Combine the olive oil, balsamic vinegar, garlic, salt, and pepper in a bowl. Marinate the mushrooms in this mixture for 15 minutes.
2. Preheat the grill or a grill pan over medium heat. Grill the mushrooms for 5-7 minutes on each side, or until tender.
3. Toast the burger buns on the grill for 1-2 minutes, or until lightly toasted.
4. Assemble the burgers by spreading mayonnaise on the buns, then adding the lettuce, tomato, grilled mushroom, and onion.
5. Serve immediately with your favorite side dish.