In a large mixing bowl, combine the ground turkey, lightly beaten egg, seasoned breadcrumbs, ¾ cup of pesto, and finely grated parmesan cheese. Season with kosher salt and pepper. Mix gently with your hands until all ingredients are well incorporated, but be careful not to overmix.
Preheat your oven to 400°F (200°C). With wet hands, form the mixture into meatballs, about 1 inch in diameter, and place them on a baking sheet lined with parchment paper.
Bake the meatballs in the preheated oven for about 15-20 minutes, or until cooked through and golden brown. Ensure they reach an internal temperature of 165°F (74°C).
While the meatballs are baking, slice the baguette lengthwise to create a perfect boat for your meatballs!
Once the meatballs are cooked, remove them from the oven. Spread ¾ cup of pesto inside the sliced baguette, layer in the meatballs, and top generously with shredded mozzarella cheese and additional parmesan.
Return the assembled melts to the oven and bake until the cheese is melted and bubbly.
