Preheat oven for 425F.
Whisk the pumpkin, sweetened condensed milk, eggs, spices and salt in a medium bowl until smooth.
Pour into crust. Bake for 15 minutes.
Reduce oven temperature to 350°F and continue baking 35 to 40 minutes or until a knife inserted 1 inch from the edge comes out clean.
Cool. Garnish with whipped topping if desired.