Pizza meatball subs are a delicious twist on the classic meatball sub. These subs are made with homemade meatballs seasoned with Italian herbs and spices, smothered in marinara sauce, and topped with melted mozzarella cheese. The meatballs are cooked in the oven until tender and juicy, then placed on a toasted sub roll and finished off with a sprinkle of Parmesan cheese. These subs are perfect for a quick and easy weeknight dinner or for serving at a party.