Make the meatball mixture by mixing ground beef, milk-soaked bread, shredded parmesan, an egg, ground nutmeg, salt, and pepper in a bowl. Scoop two tablespoons of the mixture and form a 1.5u0022 ball between your palms. Fry the meatball in oil for about 5 minutes, turning to caramelize all sides. Place the meatballs directly into the homemade tomato sauce and simmer for 15 to 20 minutes. Spoon the spaghetti and meatball sauce over the spaghetti.