Lightly coat a 9" pie pan with cooking spray or oil.
Combine all ingredients except chopped pecans and topping and stir until well blended.
Add chopped pecans and mix well.
Pour into prepared pie pan.
Bake 35- 40 minutes or until knife inserted in center comes out clean.
Cool pie completely before slicing. Serve with topping.
To prepare topping, beat heavy cream on high speed with an electric mixer until very thick and just beginning to peak. Add vanilla and pie spice and continue to beat until cream is stiff and holds a peak.