Prepare the Pie Crust

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Prepare the Crust: If using a homemade crust, roll out the dough and fit it into a 9-inch pie pan. Trim and crimp the edges as desired. If using a store-bought crust, simply place it in the pie pan.
3. Pre-Bake (Optional): For a crisper crust, pre-bake the crust for 10 minutes, then remove from the oven and set aside.

Make the Filling

1. Mix Ingredients: In a large mixing bowl, combine the mashed sweet potatoes, brown sugar, granulated sugar, condensed milk, melted butter, eggs, vanilla extract, cinnamon, nutmeg, and salt. Mix until smooth and well combined.
2. Pour into Crust: Pour the sweet potato filling into the prepared pie crust, smoothing the top with a spatula.

Add Pecan Topping

1. Arrange Pecans: Evenly sprinkle the pecan halves over the top of the pie filling, pressing them down slightly.

Bake the Pie

1. Bake: Place the pie in the preheated oven and bake for 40-45 minutes, or until the filling is set and the pecans are golden.
2. Cool: Remove the pie from the oven and let it cool on a wire rack for at least 1 hour before slicing.