Preheat oven to 350F. Spray two mini iron skillets with non stick cooking spray and set aside. (A sheet tray will work just fine, too!)
Wash mushrooms with a damp cloth and remove stems. (They should just pop out!) Set aside.
In a small bowl, stir cream cheese, parmesan, basil, oregano, garlic salt and pepper together until combined. Stir in remaining ingredients, excluding the mushrooms.
Spoon into prepared mushroom caps by the heaping teaspoonful. Place 5 in each skillet and bake 20 minutes. After 20 minutes, switch your oven from bake to broil and brown the tops of each mushroom. Remove and serve hot.