The key to a good meatball sub is all in the meatballs. I have found this mixture to be tasty.
1 pound ground beef
3/4 c bread crumbs
2 tsp dried Italian seasoning
2 cloves garlic, minced
2 T chopped fresh parsley
2 T Parmesan cheese
1 egg, beaten
4 Sandwich/Hoagie Buns
Sliced Provolone Cheese
1 C Spaghetti/Marinara Sauce
Kneed all meatball ingredients together in a medium sized bowl. Roll into 16 meatballs. Place in shallow, lightly greased pan. Bake at 350 degrees for 15-20 minutes until cooked through.
While meatballs are cooking, warm spaghetti/marinara sauce in saucepan. Add cooked meatballs and stir carefully to cover meatballs in sauce.
Prepare subs by slicing open (don't cut all the way through, make it into a pocket) and placing Provolone Cheese inside each "pocket." Add 4 meatballs to each sub. Broil until cheese is melted and sub is toasted.
***Meatballs can be frozen and reheated.