Grilled Portabella Mushrooms

These mushrooms are quite impressive with steak. I took ideas from a couple of sources and came up with these

• Ready In: 30 mins
• Serves: 4

Ingredients

• 4  portabella mushrooms
• 1 1⁄2 tablespoons butter
• 1⁄2 onion, chopped
• 1 -2  garlic, minced
• 1  tablespoon  balsamic vinegar
• 3  tablespoons parmesan cheese, use only freshly grated
•  salt and pepper
•  paprika (optional)
•  cilantro (optional) or  parsley (optional)
• 3  tablespoons panko breadcrumbs (optional)

Directions

1. Seperate stems from mushrooms, set caps aside. Coarsely chop stems. In a skillet melt butter. Add chopped stems, onion and garlic.
2. Cook over medium heat until softened. Stir in balsamic vinegar. Let cool slightly. Add parmesan cheese and panko breadcrumbs, if using. Season with salt and pepper, if needed.
3. Baste mushroom caps lightly with olive oil and place 1/4 mixture on each mushroom and sprinkle with paprika, cilantro or parsley. (mixture can be done ahead of time).
4. Heat the barbecue. Add mushrooms and cook until tender, 10 - 15 minutes. Let them cool slightly before serving (they retain the heat).