Ingredients
- 1 medium tomato, chopped (2/3 cup)
- 2 teaspoons snipped fresh basil, thyme, and/or oregano
- 1/8 teaspoon salt
- 2 medium portobello mushrooms (about 4 inches in diameter)
- 1 teaspoon balsamic vinegar or red wine vinegar
- 1/2 teaspoon olive oil
- 1/2 of a 12-inch Italian flat bread (focaccia), quartered, or 1/2 of a 12-inch thin-crust Italian bread shell (Boboli)
- Finely shredded Parmesan cheese (optional)
Description
Broiled Or Grilled Portobello Mushrooms Star In This Stunning Vegetarian Sandwich.

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