For extra flavor, try browning the meatballs in a skillet before baking to develop a deeper caramelized crust. If you prefer a smoother sauce, you can use an immersion blender to partially blend the sauce before adding the meatballs. Feel free to add a pinch of red pepper flakes to the sauce for a subtle kick of heat. For richer flavor, consider using a combination of ground beef, pork, and veal. Serve with a side of crusty bread to soak up the delicious sauce.