Preheat the oven to 350 degrees F. Prepare a 2 quart baking dish by spraying with olive oil.
In a medium sauce pan, heat the butter and olive oil over medium heat. Once warm, add the diced onion and celery. Cook for 5-8 minutes until vegetables are fully softened.
Stir in the salt, pepper, sage and cayenne. Let cook another minute, then add the chicken broth and bring to a boil.
Remove from the heat and stir in the cubed stuffing. Transfer to the baking dish and bake for 30 minutes. Serve by itself or with gravy!