You can use 1/4 cup dried parsley instead of fresh, and half-and-half or cream instead of whole milk.
If you make very small meatballs these are great to use in Italian wedding soup too! I make a pan gravy with the drippings to serve over egg noodles or fried potatoes with meatballs, too!
Please use the best quality ingredients i.e.: free-range eggs, raw dairy, pasture-raised meats, organic veggies - you can taste the difference and they are nutritionally superior to cheap alternatives.
Optional: Gravy - pour pan drippings from the cooked meatballs into a skillet, add flour (or browned flour) to make a roux, add chicken broth, and whisk well.