Sweet Potatoe Casserole

Yum, this is so good. And, it's from Cooking Light. Everytime I've made this for Thanksgiving, we run out. Last time, I made double and we still ran out.



14 cups (1-inch) cubed peeled sweet potato (about 5 pounds)
1/2 cup half-and-half
1/2 cup maple syrup
1 teaspoon vanilla extract
3/4 teaspoon salt
1 large egg, lightly beaten
Cooking spray
1/2 cup all-purpose flour
1/2 cup packed brown sugar
1/4 cup chilled butter, cut into small pieces
1/2 cup chopped pecans
Preparation
Preheat oven to 375°.
Place potato in a Dutch oven, and cover with water. Bring to a boil. Reduce heat; simmer 12 minutes or until tender. Drain.
Combine the half-and-half and next 4 ingredients (half-and-half through egg) in a large bowl, stirring with a whisk. Add potato to egg mixture; beat with a mixer at medium speed until smooth. Spoon potato mixture into a 13 x 9-inch baking dish coated with cooking spray.
Combine flour and sugar in a food processor; pulse to combine. Add chilled butter; pulse until mixture resembles coarse meal. Stir in pecans; sprinkle over potato mixture.
Cover and bake at 375° for 15 minutes. Uncover and bake an additional 25 minutes or until the topping is browned and the potatoes are thoroughly heated.