Caprese Portabello Burgers - Diabetes Self-Management

Ingredients

• 4 portobello mushrooms (about 3/4 pound), gills and stems removed
• 3 ounces mozzarella cheese, diced
• 2 plum tomatoes, chopped
• 1 clove garlic, crushed
• 1/8 teaspoon black pepper
• 2 tablespoons chopped fresh basil
• 1 tablespoon light balsamic vinaigrette
• 4 whole wheat sandwich thin rounds, toasted