Prepare the Mushroom Topping

1. Sauté the Mushrooms: In a skillet, heat olive oil over medium heat. Add sliced mushrooms, minced garlic, oregano, salt, and pepper. Sauté until the mushrooms are tender and the moisture has evaporated, about 5-7 minutes.

Assemble the Pizza

1. Preheat the Oven: Preheat your oven to 400°F (200°C).
2. Prepare the Bread: Place the halved French bread loaf on a baking sheet, cut side up.
3. Add the Mushroom Mixture: Evenly distribute the sautéed mushroom mixture over each half of the bread.
4. Add the Cheese: Sprinkle the shredded mozzarella and grated Parmesan cheese generously over the mushroom topping.

Create Spooky Shapes

1. Cut the Olive Shapes: Use the small cookie cutter to cut out bat or ghost shapes from the black olives.
2. Decorate the Pizza: Arrange the olive shapes on top of the cheese to create spooky designs.

Bake the Pizza

1. Bake: Place the baking sheet in the preheated oven and bake for about 15-20 minutes, or until the cheese is melted and bubbly and the edges of the bread are golden brown.

Serve

1. Slice and Garnish: Remove from the oven, let cool slightly, then slice into pieces. Garnish with fresh basil or parsley, if desired.