Mix margarine, brown sugar and pecans together and pat into un-baked pie shell. Bake a 400F until pie shell is brown and praline mixture bubbly. Cool. Next add butterscotch pie filling to 2 cups cold milk and mix until thick. Fold in whipped topping and pour into cooled pie shell. Refrigerate. Serve with another scoop of whipped topping.
Cajun Country -- New Iberia, Louisiana