Place parsnip, carrot, onion, and garlic in a food processor. Pulse until finely chopped.
In a large skillet, heat olive oil over medium heat. Add parsnip mixture to the skillet and cook until the parsnips and celery have tenderized, about 5-6 minutes.
Place mushrooms and walnuts the food processor. Pulse until finely chopped. Add pecans to the food processor. Pulse until coarsely chopped.
Add mushroom mixture and Italian seasoning to the skillet. Cook until tender, about 3-5 minutes. Stir in cranberries and cook 1 minute more, until stuffing is piping hot. Serve and enjoy!