We eat meatball subs quite often after church on Sunday because I just throw some meatballs I've already made and frozen into the crockpot with some spaghetti sauce before we leave for church :)
Shredded mozzarella cheese
Directions: Mix some butter with garlic salt and parsley. I never measure :) Spread butter on buns and toast in the oven at 375 degrees for about 10 minutes or until toasted. Heat up some spaghetti sauce and meatballs. Put meatballs on toasted bun. Top with some spoonfuls of sauce. Sprinkle with shredded mozzarella cheese. Broil for a few minutes until cheese is browned. Sprinkle with parmesan cheese and enjoy!
Recipe from Tammy's Blog