Boursin-Stuffed Mushrooms - Master recipes

Ingredients

• 2 tbsp. unsalted butter -
• 20 button mushrooms, stems chopped, caps reserved -
• 1/2 yellow onion, finely chopped -
• 2 cloves garlic, minced -
• 1 tbsp. finely chopped fresh parsley, plus more for sprinkling -
• 1 (5.2-oz.) block Boursin -
• 1/2 c. bread crumbs, plus more for sprinkling -
• 1/2 c. grated Parmesan -
• Kosher salt -
• Freshly ground black pepper -
• Extra-virgin olive oil, for drizzling -