Preheat your oven to 375°F (190°C).

In a large bowl, mix together the ground beef, breadcrumbs, Parmesan cheese, egg, garlic, onion powder, salt, and pepper until well combined.

Form the mixture into small meatballs, about 1-2 inches in diameter.

Place the meatballs on a baking sheet lined with parchment paper and bake for 20 minutes.

While the meatballs are baking, heat the marinara sauce in a saucepan over medium heat.

Once the meatballs are cooked, add them to the sauce, ensuring they are well coated.

To create the "eyeballs," place a slice of mozzarella cheese on top of each meatball, followed by a slice of olive to mimic the pupil.

Return the meatballs to the oven for an additional 5 minutes, or until the cheese is melted and bubbly.

Serve hot and enjoy your spooky Eyeball Meatballs!