Preheat your oven to 375°F (190°C).
2. Cook the Meatballs
Place meatballs in a baking dish and pour marinara sauce over them.
Cover with foil and bake for 20–25 minutes, or until meatballs are heated through.
3. Prepare the Rolls
Slice hoagie rolls horizontally, leaving a hinge if desired.
Place a slice of provolone cheese inside each roll.
4. Assemble the Sandwiches
