Stuffed Mushrooms

Preheat oven to 400°. Grease a baking sheet with cooking spray. Remove stems from mushrooms and roughly chop stems. Place mushroom caps on baking sheet.  In a medium skillet over medium heat, melt butter. Add chopped mushrooms stems and cook until most of the moisture is out, 5 minutes. Add garlic and cook until fragrant, 1 minute then add breadcrumbs and let toast slightly, 3 minutes. Season with salt and pepper. Remove from heat and let cool slightly.   Bake until mushrooms are soft and the tops are golden, 20 minutes.  Garnish with parsley to serve.