Sweet Potato Casserole

4 medium sweet potatoes
3/4 cup granulated artificial sweetener or sugar
1/2 cup milk
2 teaspoons grated orange rind
1/4 cup fresh orange juice
2 teaspoons vanilla extract
1 extra large egg, lightly beaten
1/2 cup all-purpose flour
3 tablespoons butter, melted
1 cup bread crumbs
1/2 cup finely chopped pecans
2 tablespoons butter, melted
3 tablespoons maple syrup

1. Preheat oven to 375°F (190°C). Lightly grease a 13 x 9-inch baking dish.
2. Place sweet potatoes on a baking sheet; bake for 1 hour or until done. Cool to touch. Peel and mash. Reduce oven to 350 degrees F.
3. Combine sweet potatoes and next 8 ingredients in a large bowl. Beat at medium speed with an electric mixer until smooth. Spoon into baking dish.
4. Combine bread crumbs and remaining ingredients; sprinkle crumb mixture over top of casserole. Bake for 1 hour or until casserole is thoroughly heated.