Preheat the oven to 425°F (220°C).
In a large bowl, whisk together pumpkin puree, sweetened condensed milk, eggs, cinnamon, ginger, nutmeg, and salt until smooth.
Pour the mixture into the unbaked pie crust.
Bake for 15 minutes, then reduce the temperature to 350°F (175°C) and continue baking for 35 to 40 minutes, or until a knife inserted near the center comes out clean.
Let cool before serving. Refrigerate leftovers.