Ingredients

• 4 portobello mushrooms
• 1/4 cup balsamic vinegar
• 2 tbsp olive oil
• 1 tbsp each basil and oregano (you could use thyme or marjoram if that's what you have on hand)
• 1 clove garlic
• pinch each salt and pepper

Directions

1. Gently pull off stems of mushrooms.
2. Brush mushrooms clean.
3. Place mushrooms smooth side up, in a single layer in shallow dish.
4. Whisk together remaining ingredients and pour over mushrooms.
5. Let stand for 15 minutes, turning once or twice.
6. Reserving marinade, place mushrooms, smooth side up on grill over medium high heat and cook for 5 to 8 minutes on each side or until tender.
7. Brush occasionally with marinade.
8. If you are using cheese, top mushrooms with it during the last 2 minutes of cooking.