1. Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.

2. In a large bowl, mix together ground beef or turkey, breadcrumbs, egg, Parmesan cheese, garlic powder, Italian seasoning, salt, and pepper until just combined.

3. Roll into golf ball-sized meatballs and place on the baking sheet. Bake for 18 to 20 minutes or until cooked through and lightly browned.

4. Meanwhile, cook the spaghetti in a large pot of salted boiling water until al dente. Drain and toss with marinara sauce in a skillet or large pot.

5. Transfer the cooked spaghetti onto a baking-safe dish or platter in small mounds.

6. Place a meatball on each spaghetti mound. Top each with a slice of mozzarella cheese so it drapes over the sides like a ghost.

7. Add two olive slices on each cheese-topped meatball to create monster eyes.

8. Place the assembled dish into the oven at 350°F for about 5 minutes until the cheese melts and holds the olives in place.

9. Serve immediately while warm and gooey!