Prepare the Bread:

• Preheat your oven to 400°F (200°C).
• Slice each baguette piece lengthwise, ensuring one side remains intact to hold the meatballs securely.

Make the Garlic Butter:

• In a small bowl, mix together the minced garlic, butter, and Italian seasoning until well combined.

Toast the Bread:

• Spread the garlic butter mixture evenly inside each baguette piece.
• Place the baguettes on a baking sheet and bake for 5-7 minutes, or until the butter has melted and the bread is lightly toasted. Remove from the oven and set aside.

Cook the Meatballs:

• In a saucepan over medium heat, combine the frozen chicken meatballs and marinara sauce.
• Cook until the meatballs are heated through and the sauce is bubbling, about 10 minutes.

Assemble the Subs:

• Place four meatballs into each toasted baguette piece, spooning additional marinara sauce over the meatballs.
• Sprinkle shredded mozzarella cheese over the top of each sub.

Bake the Subs:

• Return the assembled subs to the oven and bake for another 5-7 minutes, or until the cheese is melted and bubbly.

Serve:

• Let the subs cool for a few minutes before serving. Enjoy your delicious garlic bread meatball subs!