I've never had a meatball sub, but the idea came to me today and it sounded pretty good. I was pleasantly surprised and this will definitely be coming back.
1/2 Cup Olive Oil
1 lb Hamburger
2 Tbsp. Worcestershire Sauce
1/2 Cup Seasoned Bread Crumbs
2 Tbsp. Italian Seasoning
1/2 Tbsp. Garlic Salt
Put all ingredients for meatballs in a bowl and mix well. Form into 1 x 1 inch balls. Place olive oil on a 9 x 13 baking sheet and put the meatballs on that. Cook at 350 for 20 minutes.
Warm spaghetti sauce in a pan, do not add meatballs. Many recipes that I read said to do that, which I did but some of the grease from the meatballs thinned the sauce and made it runny.
Cut hoagie buns almost all the way through and put face up on a 9 x 13 baking sheet lined with aluminum foil. Cover both sides of the hoagie bun with mozzarella cheese. Broil in the oven until cheese is melted.
Place meatballs and sauce on hoagie buns. To make it easier to eat, you can cut the meatballs in half and lay flat side down.
Spaghetti & Meatballs
My boys wouldn't eat a meatball sub so they opted for Spaghetti & Meatballs. Sorry it's not the best picture, the steam kept getting in the way.