Homemade Meatball Sub

Ingredients

• 680 g (1 1/2 lb)ground beef
• 80 ml (1/3 cup)onion, chopped
• 2 clovesgarlic, minced
• 20 g (1/3 cup)Panko breadcrumbs
• 1egg
• 30 ml (1/8 cup)milk
• 7.5 ml (1 1/2 tsp)parsley
• 2.5 ml (1/2 tsp)oregano
• 2.5 ml (1/2 tsp)basil
• 2.5 ml (1/2 tsp)salt
• 2.5 ml (1/2 tsp)pepper
• 25 g (1/4 cup)Parmesan cheese, grated
• 907 g (32 oz)spaghetti sauce
• 6French rolls
• 12 slicesProvolone cheese

Instructions

1. 1

   Preheat oven

   Heat the oven to 180°C (350°F).

2. 2

   Mix ingredients

   Combine the ground beef, onion, garlic, breadcrumbs, egg, milk, parsley, oregano, basil, salt, pepper and grated Parmesan in a medium mixing bowl.

3. 3

   Shape meatballs

   Roll the mixture into small meatballs about 2.5 cm (1 inch) across and arrange them on a baking sheet.

4. 4

   Bake meatballs

   Bake at 180°C (350°F) for 15 minutes.

5. 5

   Transfer meatballs

   Take the baking sheet out of the oven and move the meatballs into a smaller slow cooker.

6. 6

   Simmer in sauce

   Pour the spaghetti sauce into the slow cooker and stir gently. Set it to high and cook for 4 hours.

7. 7

   Build the subs

   Spoon the meatballs and sauce into the French rolls and top with Provolone. Toast in the oven at 180°C (350°F) for a few minutes, then serve.

What is a meatball sub?

A meatball sub is a sandwich of meatballs and tomato sauce tucked into a long roll, usually with cheese. This version follows the familiar Italian-American style, using beef meatballs, spaghetti sauce and Provolone.

Mixing the meatballs at home lets the seasonings and Parmesan go directly into the beef. Baking them briefly before the slow-cooker simmer gives them a chance to hold their shape as they cook in the sauce.

Nutrition and macros by portion

The nutrition label shows one serving as written: 508 calories, 34g protein, 13g carbs, 35g fat.

The beef, Provolone and Parmesan contribute much of the protein and fat, while the rolls and breadcrumbs provide most of the carbohydrates. Add a green salad or vegetables alongside a sub for a more balanced plate.

The meatball mixture

Breadcrumbs and milk: Panko and milk help keep the beef mixture tender, while the egg binds it. Mix just until combined so the meatballs do not become dense.

Seasoning: Onion, garlic, herbs, salt, pepper and Parmesan season the meat throughout. Distribute them evenly without overworking the mixture.

Shaping and baking

Even sizing: Aim for meatballs about 2.5 cm (1 inch) in diameter so they cook at a similar rate. A consistent size also makes them easier to fit into the rolls.

Initial bake: The recipe bakes the meatballs for 15 minutes at 180°C (350°F) before adding them to the slow cooker. Handle them carefully when transferring, as they may still be delicate.

The slow-cooker simmer

Gentle stirring: Add the spaghetti sauce and stir carefully so the meatballs stay intact. Cook on high for 4 hours, as directed, allowing the sauce and meatballs to simmer together.

Doneness: Check that the meatballs are cooked through before serving. Avoid leaving the lid off for long, which can interrupt the slow cooker’s cooking.

Building a sturdy sandwich

Rolls: Spoon the meatballs and sauce into the French rolls, distributing the filling so each serving gets a balanced amount. If the rolls are very soft, take care not to overfill them.

Cheese: Top each sub with Provolone and toast at 180°C (350°F) for a few minutes, just until the cheese melts. Keep an eye on the rolls so they do not become too crisp.

Serving ideas

These subs are filling on their own, but a green salad or steamed vegetables make a fresh contrast to the rich meat and cheese. Serve promptly after toasting so the rolls stay warm and the Provolone remains melty.

Recipe notes & tips

• Chop the onion finely so it is easy to distribute through the meat mixture.
• Mix the ingredients only until they come together to help keep the meatballs tender.
• Make the meatballs as evenly sized as possible for consistent cooking.
• Stir the sauce and meatballs gently when transferring them to the slow cooker.
• Toast the filled rolls only until the Provolone melts, checking frequently.

Variations

• Use a different cheese: Swap the Provolone for another good-melting cheese.
• Change the herbs: Adjust the parsley, oregano or basil to suit your taste.
• Choose another sauce: Use a different spaghetti sauce in the same quantity.
• Make smaller subs: Divide the filling between smaller rolls for easier portions.
• Add a side salad: Serve with crisp salad leaves for a fresh contrast.

Common mistakes to avoid

• Overmixing the beef: It can make the meatballs dense; combine the ingredients only until evenly mixed.
• Uneven shaping: Different-sized meatballs may cook at different rates; keep them close to 2.5 cm (1 inch).
• Rough stirring: Meatballs can break apart; fold them gently into the sauce.
• Overfilling the rolls: The filling can spill out; spoon it in evenly and leave room to hold the sandwich.
• Leaving the rolls in too long: They can become overly crisp; toast just until the cheese melts.

How to store

Refrigerate leftover meatballs and sauce in a covered container for up to 3–4 days. Reheat until hot, then assemble and toast the rolls just before serving; store the rolls separately so they do not become soggy.

Frequently asked questions