Preheat oven to 350. Grease 9x13 baking dish with cooking spray, set aside.
If using fresh bread: line a baking sheet with foil, spray lightly with cooking spray. Bake the cubed bread for about 7 minutes. Set aside in a large bowl. If using stale bread, skip to next step.
Melt butter in sautee pan. Add onions, carrots, celery and spices. Sautee until soft and onions are translucent, about 8 minutes. Add butter if the pan gets dry.
Add sausage, breaking up as you brown the meat. Sautee until cooked through.
Remove sausage and vegetable mixture from the heat. Add to the bread with broth and sliced grapes.
Cover with foil and bake for 25 minutes.
After 25 minutes, remove foil and continue to bake until bread is golden, about 20 minutes.