1. Preheat oven to 275 degrees. Spread challah cubes onto two sheet pans in one layer. Toast, stirring every 10 minutes, until bread has “staled,” about 45 minutes. Set aside. Increase oven temperature to 375 degrees.
2. In a 12-inch nonstick skillet, heat 2 teaspoons oil over medium-high heat. Add onions and celery and cook until starting to brown, about 5 minutes. Transfer to medium bowl and set aside.
3. In same skillet, heat 1 tablespoon plus 1 teaspoon oil over medium-high heat. Add mushrooms until browned, about 5 minutes. Transfer to bowl with vegetables.
4. Add challah and apples. Stir in broth, thyme and sage. Mix to combine.
5. Butter or grease 13×9 baking dish. Transfer stuffing to pan and bake until top is brown and crisped, 45 minutes to an hour.
Reprinted from JewishBoston.com