Cheesy Mozzarella Meatball Sub

Ingredients

• 2 tablespoons olive oil
• 1 loaf Italian bread, cut into four pieces and halved
• 1/4 teaspoon ground pepper
• 1 cup shredded mozzarella cheese
• 4 cups store-bought marinara sauce
• 1/2 cup finely grated Parmesan cheese
• 1 large egg
• 1/2 teaspoon minced garlic
• 1/2 teaspoon salt
• 2 tablespoons finely chopped fresh parsley
• 1 1/4 pounds ground meat
• 1/2 cup plain bread crumbs