Preheat your oven to 400°F and line a baking sheet with aluminum foil or parchment paper.
In a large mixing bowl, combine the ground beef, breadcrumbs, eggs, olive oil, parsley, garlic powder, onion powder, salt, and pepper until everything is thoroughly blended.
Roll the mixture into 2-inch wide balls and place them onto your prepared baking sheet, ensuring there’s about ½ inch of space between each meatball.
Bake the meatballs in the preheated oven for 18-20 minutes or until they are golden brown on top and fully cooked through.
Once baked, cut slices of provolone cheese into 1-inch circles and place one circle on top of each meatball followed by a slice of black olive.
While the meatballs are baking, cook your spaghetti according to package instructions in boiling water until al dente; drain well before tossing with heated marinara sauce before serving with the creepy meatballs on top.