3 stuffed grilled portabellas with balsamic Recipes

extra virgin olive oil, balsamic vinegar, balsamic vinegar, garlic cloves, minced, divided, portabella mushrooms, stemmed, panko breadcrumbs (japanese breadcrumbs), shredded mozzarella cheese (about 5 oz), grated parmesan cheese (about 2 oz), chopped green onion, chopped fresh oregano, chopped fresh thyme, butter, melted

olive oil, divided, tomatoes (or grape ), salt, plus more for sprinkling, black pepper, divided, dried basil, portabella mushrooms, stems and gills removed, balsamic vinegar, smoked mozzarella cheese, thinly sliced (or regular mozzarella), baby spinach, steamed