Preheat the oven to 450F degrees. Spray a half sheet pan (18x13-inches)with nonstick cooking spray.
On a lightly floured surface, unroll 3 of the 4 refrigerated pie crusts (after they've softened for a few minutes to make them easier to unroll) and place the crusts end to end and roll out to a 19 x 14-inch rectangle. The crusts may need to overlap slightly.
Fit the crust into the prepared sheet pan. Fold extra crust underneath and crimp if desired. Poke bottom and sides of crust with fork. Bake for 7 to 9 minutes or until light golden brown. Remove from the oven and set aside.
Reduce oven temperature to 375F degrees.
Using a blender, food processor, stand mixer or by hand, combine 2 cups mashed sweet potato, 1 cup packed light brown sugar, 3 large eggs, 1 ½ cups half-and-half, 1 teaspoons vanilla extract, ¾ teaspoon ground cinnamon and ¼ teaspoon ground ginger until smooth. Note: there may be a few little lumps in the battered that's okay.
Pour filling mixture on top of pie crust in baking dish. Bake 25 to 28 minutes or until the center of filling is set, remove from the oven.
Cool on the cooling rack until cool then refrigerate for at least 1 hour.
Meanwhile, prepare the final crust for decoration. Remove pie crust from the refrigerator and let it sit out for a few minutes to make it easier to roll out. Using different size round cookie cutters, cut out shapes.
Bake the pie crusts shapes on an ungreased cookie sheet for 11-15 minutes until lightly golden. Arrange them on your cooled pie and serve!
Notes
This can be frozen, see my tips above.
This recipe works great for leftover baked sweet potatoes.
Do not use canned yams for this, they are too watery.
See my FAQ's above for how best to prepare the sweet potatoes.
If you can find the Steam and mash sweet potatoes in the frozen section. You can use those. Just prepare them as written on the back of the package then allow to cool after mashing and continue with this recipe as written.
The topping decorations are optional but fun.
You can use your own homemade pie crust recipe, make sure that it makes 4 crusts.