Recipe: Cheesy Pizza Portobello Mushrooms

Name: Recipe: Cheesy Pizza Portobello Mushrooms
Ingredients: Vegetable oil or nonstick cooking spray, for oiling the baking sheet; 6 large portobello mushrooms (about 5 inches), stemmed (see Recipe Notes for mini substitutes); 4 tablespoons extra-virgin olive oil; 2 tablespoons balsamic vinegar; 2 teaspoons finely minced garlic; Kosher or coarse salt and freshly ground black pepper, to taste; 3/4 cup panko breadcrumbs; 3/4 cup shredded mozzarella cheese; 1/2 cup freshly grated Parmesan cheese; 1/2 teaspoon dried oregano, or 1 teaspoon minced fresh oregano leaves; 1/2 teaspoon dried thyme, or 1 teaspoon minced fresh thyme leaves; 1/2 cup jarred or homemade pasta sauce