After reading about people making meatball subs (and making them myself) I have been looking at every recipe I see now. The stuffed meatballs sound good. I think I'm going to try this one. It can be tailor made to your family's taste buds. I'm thinking I could use white and cheddar cheese curds that we have made fresh here in dairy land.
http://the-polka-dot-umbrella.blogspot.com/2011/05/mozzarella-stuffed-meatballs.html
http://the-polka-dot-umbrella.blogspot.com/2011/05/mozzarella-stuffed-meatballs.html