A piece Ciabatta Bread, sliced in half 1/2 cup mozzarella cheese – shredded 1/2 cup parmesan cheese – shredded 3 tablespoons parsley - fresh, chopped 1 red onion - sliced thin 3 tablespoons balsamic vinegar 2 zucchini (7-8 inches long) - yellow or green, cut into thin rounds 1/4 cup red peppers - cut into thin strips olive oil for grilling