Follow these simple steps to create your Ghostly Stuffed Mushrooms:

1. Preheat Oven: Set your oven to 375°F (190°C) and prepare a baking sheet by lining it with parchment paper.
2. Clean Mushrooms: Gently clean the mushrooms with a damp cloth and remove the stems, creating a hollow space for stuffing.
3. Prepare Filling: In a bowl, combine softened cream cheese, mozzarella cheese, Parmesan cheese, minced garlic, parsley, Italian seasoning, salt, and pepper. Mix until fully combined.
4. Stuff Mushrooms: Using a spoon or your hands, fill each mushroom cap generously with the cheese mixture.
5. Arrange on Baking Sheet: Place the stuffed mushrooms on the prepared baking sheet, ensuring they’re spaced apart for even cooking.
6. Drizzle with Olive Oil: Lightly drizzle olive oil over each mushroom for added moisture and flavor.
7. Bake: Place the baking sheet in the preheated oven and bake for 20-25 minutes, or until the mushrooms are tender and the cheese is golden brown.
8. Garnish and Cool: If desired, add black olive slices on top to create “eyes” for your ghostly mushrooms. Allow them to cool for about 5-10 minutes before serving.

With these clear and straightforward instructions, you’ll soon have a tray of Ghostly Stuffed Mushrooms ready to impress your guests!