Slow Cooker Caprese Meatball Subs

"Slow Cooker Caprese Meatball Subs are actually a slow cooker budget recipe that tastes like a million dollars. It is a simple recipe using frozen meatballs, but it dressed up with fresh basil and mozzarella for a homemade taste. It perfect for when you are tight with money but want to feed a crowd. Plus using the frozen meatballs, these subs will cook up in no time at all. One bite and they will become a family favorite"