You will need ½ to ¾ oz. meatballs (1 oz. will work). I buy frozen, but you can make your own. Heat meatballs with pizza sauce (whatever your favorite sauce, I use either Dom Pepino pizza or homemade pizza sauce). I usually buy the 6” hoagie or sub rolls. Cut a pocket into the roll just deep enough to hold you meatballs. Today many of them are already sliced. Wrap foil around you roll folded back like a boat-with the cut exposed-to hold it together. Put chopped raw onions and hot chopped peppers into the roll first. Then, fill your roll with meatballs and sauce. Top with mozzarella cheese or what 450 F. until the cheese is melted and starting to brown.
We made meatball subs in the restaurant. Before we served them, we would go to a couple of other restaurants where they were served. I’ve always enjoyed meatball subs.