Preheat the oven to 350° F. Coat an oven safe dish (9X9 or 9X13) with non stick spray.
Place a large pan over medium heat. Once heated, cook the chicken sausage and break it into pieces as you cook. Transfer the cooked sausage to a plate. Set aside.
In the same pan, melt the butter and add the olive oil. Sauté the onion and celery until translucent.
Add in the diced apples and cook for 5 minutes.
Add in the cooked sausage, parsley, thyme, salt, smoked paprika and maple syrup if using. Stir well so that everything is combined.
Mix in the croutons and stir well.
Mix in chicken stock using a wooden spoon.
Transfer the stuffing to the oven safe dish. Make sure everything is well combined.
Bake in the oven for 30 minutes until golden brown and crispy on top.