Preheat oven to 400 degrees Fahrenheit. Place cubed bread in a single layer on baking sheets and bake about 10 minutes, until slightly toasted. Remove from oven and transfer to a large bowl.
Reduce heat to 350 degrees. Lightly spray a shallow casserole dish and set aside.
Heat olive oil or vegan butter in a large skillet and sauté celery, onions, and apples until slightly soft. Add spices and pecans. Stir to coat and remove from heat.
Add apple/pecan mixture to bread and mix until evenly combined.
Slowly pour over the vegetable broth, mixing while adding until everything is evenly hydrated.
Transfer to prepared casserole dish and bake, covered, for 20-25 minutes. Remove cover and bake for an addition 10 minutes until lightly brown.