|1||pound fresh, whole mushrooms|
|1||medium onion, diced|
|3||bread slices, torn in pieces (3-4 slices)|
|1||cup mozzarella cheese|
|1/2||teaspoon garlic salt|
|milk, if needed|
Remove mushroom stems and dice. Mix diced stems with butter and onions, then microwave for two minutes. Stir in bread, cheese, egg, and seasonings. Add milk if needed to moisten and set aside. Lay mushroom caps upside down in a greased pie pan. Sprinkle with additional salt then spoon stuffing mixture over top. Bake at 350 degrees F for 20 minutes.