Portobello Mushroom Burgers
This meaty portobello mushroom burger has a juicy grilled, marinated mushroom, topped with melty cheese, served in a bun with your favorite toppings.
- 4 portobello mushroom caps
- 0.25 cup balsamic vinegar
- 2 tablespoons olive oil
- 1 tablespoon minced garlic
- 1 teaspoon dried basil
- 1 teaspoon dried oregano
- salt and pepper to taste
- 4 (1 ounce) slices provolone cheese
- hamburger buns
- lettuce, tomato, and red onion for serving