Step 1: Prepare the Sweet Potatoes

1. Preheat your oven to 375°F (190°C).
2. Wash, peel, and dice the sweet potatoes into chunks.
3. Boil the sweet potato pieces in a pot of water for about 15-20 minutes or until they are fork-tender. Drain and mash until smooth.

Step 2: Prepare the Pie Filling

1. In a large mixing bowl, combine the mashed sweet potatoes, sweetened condensed milk, eggs, cinnamon, nutmeg, ginger (if using), vanilla extract, and salt.
2. Mix thoroughly using a whisk or hand mixer until the mixture is smooth and well combined.

Step 3: Prepare the Pie Crust

1. Roll out the pie crust and fit it into a 9-inch pie pan.
2. Trim the edges and crimp them for decoration if desired.

Step 4: Assemble the Pie

1. Pour the sweet potato filling into the prepared pie crust, spreading it evenly with a spatula.

Step 5: Bake the Pie

1. Place the pie on the center rack of the oven and bake for 40-45 minutes or until the filling is set and the crust is golden brown.
2. To check doneness, insert a toothpick into the center of the pie—it should come out clean.

Step 6: Cool and Serve

1. Allow the pie to cool on a wire rack for at least 2 hours to set properly.
2. Serve at room temperature or chilled, topped with whipped cream if desired.