I saw this recipe idea in a book called Fix-It and Forget-It. It is a kids cookbook I checked out at the Library. It was a fun book and had great ideas for Crockpot recipes that kids can help you make.
You can buy it here. I loved this idea for making small meatball subs.
All you need is a good hard roll, spaghetti sauce and meatballs.
(Cheese Optional) At our house, we prefer a homemade turkey meatball but would also recommend Jennie O's Turkey Meatball. We also like the steak rolls from Walmart.
I cooked my meatballs and sauce in a crockpot following the directions of the cookbook. Then it keeps it warm throughout the game. You could also make a platter full of subs already made.