Sweet Potato Pie 2

1 prepared piecrust
2 c mashed cooked sweet potato (about 1 1/4 pounds)
1 c evaporated fat-free milk
3/4c brown sugar or Splenda
1 tsp vanilla extract
1/2tsp grated lemon rind
1/2tsp ground cinnamon
1/4tsp kosher salt
1/4tsp ground nutmeg
2 eggs
1 1/4c whipped cream topping
Ground cinnamon (optional)

Preheat oven to 350°. Combine sweet potato and next 8 ingredients (sweet potato through eggs) in a food processor, and process until smooth. Spoon mixture into prepared crust. Bake at 350° for 45 minutes or until set; shield edges of piecrust with foil after 20 minutes. Cool completely on a wire rack. Top each serving with whipped topping, and sprinkle with cinnamon, if desired.