Preheat the oven to 425°F (220°C). Place the unbaked pie crust into a 9-inch pie plate and set aside.
In a medium-sized mixing bowl, whisk together 1 (15 ounce can) pumpkin puree, 1 (14 ounce can) sweetened condensed milk, 2 large eggs, 1 teaspoon ground cinnamon, 1/2 teaspoon ground ginger, 1/2 teaspoon ground nutmeg, and 1/2 teaspoon salt until the mixture is smooth and fully combined.
Pour the filling into the prepared pie crust, smoothing out the top with a spatula.
Place the pie in the preheated oven and bake at 425°F for 15 minutes. After 15 minutes, reduce the oven temperature to 350°F (175°C) and continue baking for an additional 35 minutes. The pie is done when the center is set and no longer jiggles when gently tapped.
Remove the pie from the oven and allow it to cool completely on a wire rack before serving.