Ingredients
- 2 large portobello mushroom caps, stemmed
- 3 tablespoons balsamic vinegar
- 1 tablespoon olive oil
- 1 teaspoon minced fresh garlic
- 1/2 teaspoon pepper
- 1/4 teaspoon salt
- 1/4 cup crumbled blue cheese or Gorgonzola cheese
- 2 tablespoons light mayonnaise
- 1 teaspoon balsamic vinegar
- 2 whole wheat hamburger buns, split
- Romaine lettuce leaves
- 2 tomato slices
Description
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