Empty the stuffing mix into a large mixing bowl and reserve.
Place a medium sauté pan over medium-high heat with the EVOO, about three turns of the pan. Add the sausage, turning occasionally, and cook about 4 minutes per side. Remove the sausage from the pan, allow to cool slightly, then roughly chop it up and reserve.
As soon as the sausage is removed from the pan, add and melt the butter. Add the onion, celery, mushrooms and pears to the pan and allow them to cook 5 minutes, until they start to get tender. Add the herbs, cook a minute or two, then add the liquids, turkey giblets and neck and simmer 5 minutes or so.