Grilled Portobello Mushrooms

Bahan-bahan (4 porsi)

• 4 large portobello mushrooms (stems and gills removed, wiped clean)
• 1/4 cup balsamic vinegar
• 1 tablespoon extra virgin olive oil
• 1 tablespoon low sodium soy sauce
• 1 tablespoon chopped fresh rosemary (or 1/2 teaspoon dried)
• 1 teaspoon garlic powder
• 1/2 teaspoon ground black pepper
• 1/8 teaspoon cayenne pepper (optional, plus additional to taste)
• Canola or vegetable oil (for grilling)
• Optional for serving: Herby Avocado Sauce; these also make delicious mushroom burgers