01 -
Set your oven to 400°F (200°C) to prepare for toasting the buns for a crispy texture.
02 -
Place a large sauté pan over medium-high heat. Add the ground chicken, breaking it up with a spoon as it cooks. Cook for about 5-7 minutes until it is no longer pink and starts to brown slightly.
03 -
Add the diced yellow onion to the pan and stir. Cook for 3-4 minutes until the onions are softened and translucent.
04 -
Pour the marinara sauce into the pan. Add the basil pesto, salt, and pepper. Stir to coat the chicken and onion mixture. Allow it to come to a gentle simmer.
05 -
Reduce heat to low. Sprinkle shredded Parmesan cheese over the mixture and stir well. Let simmer to meld flavors while preparing buns.
06 -
Place split brioche buns with cut sides up on a baking sheet. Spread softened garlic margarine or butter evenly on each half. Toast in the oven for 5 minutes or until lightly golden.
07 -
Place the bottom halves of buns on serving plates. Spoon the hot chicken Parmesan mixture onto each bun bottom, dividing evenly.
08 -
Sprinkle shredded mozzarella cheese over the hot chicken mixture. Optionally place the assembled sandwiches back in the oven for 1-2 minutes for extra melting.
09 -
Top with upper bun halves. Garnish with fresh basil leaves if desired and serve immediately while hot.