Preheat your oven to 375°F (190°C).
Cook the spaghetti according to package directions, drain well, and set aside.
In a bowl, mix together the beef, Parmesan, breadcrumbs, egg, garlic, oregano, salt, and pepper until combined.
Shape into small bite-sized meatballs and place them on a baking sheet.
Bake the meatballs for 18-20 minutes until cooked through.
Warm the marinara sauce in a pan and toss the baked meatballs gently to coat.
Twirl small nests of spaghetti onto a greased mini muffin tin or parchment-lined tray.
Place one saucy meatball on top of each spaghetti nest and secure with a toothpick.
Sprinkle with fresh parsley and serve warm.