Cook wild rice in 2 cups (480ml) of water for 45 minutes or until it fluffs up. Drain any remaining liquid left in the pot. Set aside.
In a large pan, heat vegetable oil. Saute onion, carrot, and celery for 3 minutes. Stir in rubbed sage, rosemary, and thyme.
Add pears and cooked wild rice. Cook for 3 minutes.
Add cubed bread and apple juice.
Give it a stir then add chestnuts. Season with salt and pepper. Stir to get ingredients well mixed. Allow it to cook for another 3 minutes. Turn off heat.
Transfer to a baking dish. Cover with foil and bake at 350°F (180°C) for 20 minutes.