Preheat oven to 350 degrees F.  Grease the bottom of a 9 inch glass pie pan. Set aside. In a mixer bowl whip together cream cheese and sweetener until smooth. Add egg, vanilla, and salt. Mix until just combined. Spread evenly on the bottom of the pie pan. Set aside. Combine pumpkin layer ingredients in blender or in a bowl. Blend until smooth. Carefully pour over cream cheese mixture. For streusel topping combine baking blend, Brown Sugar Sweetener, and walnuts together. Mix in cold butter until just combined. Sprinkle over the pumpkin layer. Cover the pie plate with foil--folding up the center so it doesn't touch the filling. Place in over for 25 minutes. Remove foil and bake 15-20 minutes longer or until center of the pie is just so set. Remove from oven and cool for 8 hours. Serves 8.