1-1/2 teaspoons minced fresh basil or 1/2 teaspoon dried basil
1-1/2 teaspoons minced fresh oregano or 1/2 teaspoon dried oregano
2 large portobello mushrooms, stems removed
2 slices reduced-fat provolone cheese
2 hamburger buns
In a small bowl, whisk the first seven ingredients. Add mushroom caps; let stand for 15 minutes, turning twice. Drain and reserve marinade.
Using long-handled tongs, moisten a paper towel with cooking oil and lightly coat the grill rack. Grill mushrooms, covered, over medium heat or broil 4 in. from the heat for 6-8 minutes on each side or until tender, basting with reserved marinade. Top with cheese during the last 2 minutes.