Sweet Potato Casserole

I've made this casserole the last 3 Thanksgivings! I love it so much. I think it may be better leftover than the day of Thanksgiving. This is from Cooking Light
Ingredients
Potatoes:
2 1/4 pounds sweet potatoes, peeled and chopped( I use about 3 large potatoes)
1 cup half-and-half
3/4 cup packed brown sugar
1 teaspoon salt
2 teaspoons vanilla extract
2 large eggs
Cooking spray
Topping:
1 1/2 cups miniature marshmallows
1/2 cup all-purpose flour (about 2 1/4 ounces)
1/4 cup packed brown sugar
1/4 teaspoon salt
2 tablespoons chilled butter, cut into small pieces
1/2 cup chopped pecans, toasted( I don't toast my nuts before hand and thought it turned out fine)

Preparation
Preheat oven to 375°.

To prepare potatoes, place potatoes in a Dutch oven, and cover with water. Bring to a boil. Reduce heat, and simmer 20 minutes or until very tender. Drain; cool slightly.

Place potatoes in a large bowl. Add half-and-half, 3/4 cup sugar, 1 teaspoon salt, and vanilla. Beat with a mixer at medium speed until smooth. Add eggs; beat well (mixture will be thin). Scrape mixture into a 13 x 9-inch baking dish coated with cooking spray.

To prepare topping, sprinkle miniature marshmallows over top of casserole. Lightly spoon flour into a dry measuring cup; level with a knife. Combine flour, 1/4 cup sugar, and 1/4 teaspoon salt in a medium bowl. Cut in butter with a pastry blender or 2 knives until mixture resembles coarse meal. Stir in pecans, and sprinkle over potato mixture and marshmallows. Bake at 375° for 30 minutes or until golden brown.