In a large saute pan, heat the oil. When the oil is hot, render the sausage for about 3 minutes. Add the onions, celery, and bell peppers and saute for 5 minutes, or until the vegetables are wilted. Add the corn bread and chicken stock and mix well. Season the dressing with salt and cayenne. Cook, stirring, for 2 to 3 minutes. Remove from the heat. Season the entire turkey with Essence. Stuff the duck into the turkey. Stuff the remaining space with the dressing. Using butchers twine, tie the turkey to secure the ends.