Stuffed Mushrooms

I guarantee that these will be a hit at any party or potluck!  Somehow always the topic of conversation and always the first to run out.

These are always a hit!
INGREDIENTS
20 fresh mushrooms, stems removed
1 clove garlic, peeled and minced
1/2 cup grated Parmesan cheese
1 small onion, finely chopped
3/4 cup dry bread crumbs
1/2 cup chopped green bell pepper
2 tablespoons dried parsley
2 tablespoons Italian-style seasoning
ground black pepper to taste
1/4 stick butter, melted
1/2 cup shredded mozzarella cheese
 olive oil
DIRECTIONS
Preheat oven to 350 degrees F (175 degrees C). Lightly grease a 9x13
inch baking dish.
Arrange mushroom caps hollow side up in the baking dish.
In a medium bowl, mix together garlic, parmesan cheese, onion, bread
crumbs, green bell pepper, parsley, Italian-style seasoning and black
pepper. Slowly stir in approximately 1/2 the butter, enough to make
the mixture slightly moist.
Generously fill the mushroom caps with the mixture. Sprinkle with
mozzarella cheese. Drizzle with olive oil.
Bake in the preheated oven 30 minutes, or until lightly browned.