INGREDIENTS
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12 large portobello mushrooms, stemmed and gills removed
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6 tablespoons balsamic vinegar
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1/2 cup extra-virgin olive oil, divided
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Sea salt, preferably gray salt and freshly ground black pepper
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1 cup fresh bread crumbs
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1 cup grated Parmesan
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4 tablespoons freshly chopped parsley leaves
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4 tablespoons freshly chopped basil leaves
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12 (1/2-inch) slices fresh mozzarella, roughly 1 to 1 1/2-ounces per slice