Preheat oven to 425º. With a mixer, beat hot sweet potatoes and butter until smooth. Add remaining ingredients, except crust and pecan topping; mix well. Pour into crust. Bake 20 minutes; remove pie from oven.
To make pecan topping, beat together egg, dark corn syrup, brown sugar, melted butter, and maple flavoring. Stir in pecans.
Reduce oven heat to 350º. Spoon pecan topping on pie. Bake 25 minutes or until set; cool. Serve warm. Refrigerate leftovers.