Preheat your grill to medium-high heat
Place the Carando Abruzzese Fresh Italian Meatballs on the grill grates.
Grill the meatballs, turning occasionally, until they are cooked through and have a smoky, charred exterior.
Preheat your oven to 375°F (190°C).
Slice the hoagie rolls lengthwise, creating a pocket for the meatballs.
Place a slice of provolone cheese inside each hoagie roll.
Heat the marinara sauce in a saucepan on the stovetop or in the microwave until warmed through.
Place the grilled meatballs into the hoagie rolls on top of the provolone cheese.
Pour a generous amount of warm marinara sauce over the meatballs.
Sprinkle shredded mozzarella cheese over the top of each sub.
Place the assembled subs on a baking sheet and bake in the preheated oven until the cheese is melted and bubbly.
Remove the subs from the oven and sprinkle with grated Parmesan cheese and fresh parsley for a finishing touch.
Allow the subs to cool slightly before slicing.
Serve your Meatball Subs hot and enjoy the delicious combination of smoky grilled meatballs, gooey melted cheese, and flavorful marinara sauce in every bite!