Heat oven to 350 degrees F.
Place bread cues in 13x9 baking dish sprayed wiht cooking spray.
Beat eggs, milk, pumpkin, 1 cup sugar, 1/2 tsp pumpkin pie spie and vanilla with whisk until well blended. Pour evenly over breat, sprinkle with nuts. Bkae 45 min. or until knife inserted in center comes out clean.
Meanwhile, mix sour cream, remaining sugar and pumpkin pie spice until blended. Stir in cool whip. Drizzle syrup over pudding serve warm topped with sour cream mixture.
Make ahead: Aseemble dessert as directed, cover and refrigerate several hours or overnight. When ready to serve, bake at 350 degrees F uncovered 1 hour or until knife inserted in center comes out clean.
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