Preheat your oven to 400°F (200°C).
Slice each bagel in half horizontally, creating a top and bottom for each.
Arrange the bagel halves cut side up on a baking sheet lined with parchment paper.
Lightly spray the bagel halves with olive oil to help them crisp up in the oven.
Spread a generous tablespoon of pizza sauce on each bagel half.
Sprinkle shredded mozzarella cheese over the sauce, making sure to cover the entire surface.
To create ghostly faces, place black olive slices for eyes and pepperoni for mouths on the cheese layer.
Sprinkle a dash of Italian seasoning over the top for added flavor.
Bake the bagels in the preheated oven for about 10-12 minutes, or until the cheese is bubbly and golden brown.
Remove the bagels from the oven and let them cool slightly before serving.