Preheat the oven to 400ยบ.
Remove stems and clean out the inside of the mushroom cap with a spoon.
In a bowl- mix together all ingredients EXCEPT the Olive oil and 1/2 cup mozzarella cheese.
Place mushrooms in a baking dish.
Fill with stuffing.
Drizzle with Olive oil.
Top with remaining mozzarella cheese.
Bake for 10-15 minutes or until mushrooms are tender.