1 (15-ounce) can pumpkin 
      1 (14-ounce can) sweetened condensed milk (not evaporated milk)
      2 eggs
      1 teaspoon ground cinnamon
      1/2 teaspoon ground ginger
      1/2 teaspoon ground nutmeg
      1/2 teaspoon salt
      1 (9-inch) unbaked pie crust
      Sour Cream Topping
      1-1/2 cups sour cream 
      4 tablespoons sugar
      1 teaspoon vanilla extract
    
    
      Preheat oven to 425 degrees F.  In a mixing bowl, combine pumpkin,
      sweetened condensed milk, eggs, cinnamon, ginger, and nutmeg.  Mix
      well.  Pour into a prepared pie crust.  Bake for 15
      minutes.  Reduce oven heat to 350 degrees F. and continue baking for
      30 minutes.  
      For topping, combine the sour cream, sugar, and vanilla in a medium
      bowl.  After pie has baked 30 minutes at 350 degrees, spread evenly
      over top.  Continue baking for 10 minutes.  Cool and stored
      covered in refrigerator.