1-First Step: Preheat your oven to 400°F and line a baking sheet with foil or parchment paper. This prepares your workspace and ensures even cooking, preventing the meatballs from sticking and making cleanup easy for vegan adaptations, have your plant-based substitutes ready at this stage.

2-Second Step: In a large bowl, combine 1 pound ground beef, 1 pound ground pork, 1 cup breadcrumbs, 2 large eggs, 1 tablespoon olive oil, 1 tablespoon parsley flakes, 2 teaspoons garlic powder, 2 teaspoons onion powder, ½ teaspoon salt, and ¼ teaspoon black pepper. Mix everything thoroughly with your hands or a spoon until well blended; for gluten-free versions, use gluten-free breadcrumbs in the same amount to keep the mixture cohesive.

3-Third Step: Roll the meat mixture into 2-inch wide balls and place them on the prepared baking sheet, spacing them about ½ inch apart. Aim for uniform sizes to ensure even cooking, which takes about 18-20 minutes in the oven for low-calorie options, use leaner meats to reduce fat content while maintaining the shape.

4-Fourth Step: Bake the meatballs in the preheated oven for 18-20 minutes until they are golden and cooked through to an internal temperature of 160°F. While they bake, cut the 8 ounces of sliced provolone cheese into 1-inch circles; if making a vegan version, prepare a dairy-free cheese alternative in the same quantity for the eyeball effect.

5-Fifth Step: Remove the meatballs from the oven and immediately place a provolone circle on each one, then top with a slice from the 2.25 ounces of canned sliced black olives to form the eyeballs. Return them to the oven for an additional 2-3 minutes until the cheese melts slightly, creating that creepy look adapt by using low-sodium olives if needed for dietary restrictions.

6-Sixth Step: While the meatballs finish, boil 16 ounces of dried spaghetti according to the package directions, which usually takes 8-10 minutes in boiling water. For healthier twists, choose whole wheat spaghetti in the same amount to boost fiber intake.

7-Seventh Step: Heat the 16 ounces of marinara sauce in a saucepan over medium heat for about 5 minutes until warmed through. If opting for a low-sugar sauce, this step helps maintain flavor without excess sweetness.

8-Eighth Step: Toss the cooked spaghetti with the heated marinara sauce in a large bowl, then plate it and arrange the eyeball meatballs on top. For the best presentation, garnish with a sprinkle of parsley if desired, and serve immediately your spooky spaghetti with creepy eyeball meatballs is ready to enjoy, tailored to various preferences like vegan or gluten-free options for a crowd-pleasing meal.