Preheat oven to 350°F

Remove stems from mushrooms and finely chop.

Melt butter in a small skillet over medium heat. Add bacon, chopped mushroom stems, onion, and garlic and sauté until onions are tender. Drain.

Place all ingredients except the mushroom caps in a bowl and stir until well combined.

Spoon mixture into each mushroom cap, stuffing full.

Place on a cookie sheet and bake for 10-12 minutes, or until slightly brown on top and mushrooms are tender to touch and heated all the way through.

Best if served warm.