Ingredients

1 pound fresh, whole mushrooms
4 tablespoons butter
1 medium onion, diced
3 bread slices, torn in pieces (3-4 slices)
1 cup mozzarella cheese
1 egg
1/2 teaspoon salt
1/2 teaspoon garlic salt
1/8 teaspoon pepper
milk, if needed

Instructions

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.