Sweet Potato Pie

1 unbaked pie crust
1 lb sweet potatoes, cooked and peeled
¼ cup butter
2 eggs
14 oz. sweetened condensed milk
1 tsp. vanilla
1 tsp. grated orange rind
1 tsp. cinnamon
1 tsp. nutmeg
¼ tsp. salt
-Preheat oven to 350 degrees F. In bowl, beat sweet potatoes and butter until smooth. Add milk, orange rind, vanilla, cinnamon, nutmeg, salt and eggs; mix well. Pour into pie shell and bake 30 minutes or until golden brown cool. And top with whipped cream.