Preheat oven to 425°F. Prepare pie crusts and set aside.
In a medium bowl, combine pumpkin puree, sugar, eggs, evaporated milk, cinnamon, ginger, nutmeg, and salt. Mix well together.
Pour filling into prepared pie crusts.
Before putting in oven, put small pieces of aluminum foil around edges of pie crust. This will prevent edges from getting burned.
Place into oven. Bake at 425°F for 15 minutes. After 15 minutes, carefully remove the pie from oven. Remove aluminum foil. Reduce temperature to 350°F. Bake for an additional 30-40 minutes.
Remove from the oven. Allow to cool for 5 minutes.
Serve immediately. Top with whipped cream, if desired.