If you like a lot of sauce, double the sauce ingredients.
You can substitute Italian sausage for breakfast sausage.
You can also substitute 1/2 cup chopped fresh parsley if you don't have basil and chives.
Meatballs can be formed the day before; cover and refrigerate until ready to bake. *I prefer to make my meatballs at least an hour before I'm ready to cook to allow the flavors to marry, it's even better done the day before.