1Heat oven to 300ºF. Spread bread cubes in single layer in large roasting pan or baking pan. Bake 10 to 15 minutes or until lightly toasted; set aside.
2Place 3 cups broth, the wild rice and mushrooms in 4- or 5-quart slow cooker. Cover and cook on high heat setting 3 hours.
3Add remaining ingredients except 3/4 cup broth to wild rice mixture. Add bread cubes. Pour 3/4 cup broth over bread mixture; toss gently. Cover and cook on low heat setting 4 hours to 4 hours 30 minutes. Note: This recipe was tested in slow cookers with heating elements in the side and bottom of the cooker, not in cookers that stand only on a heated base. For slow cookers with just a heated base, follow the manufacturer’s directions for layering ingredients and choosing a temperature.