Sugar Free Pumpkin Pie

1 (9 inch) pie crust, baked
1 (.25 ounce) envelope unflavored gelatin
2 tablespoons cornstarch
1 1/4 teaspoons ground cinnamon
1/2 teaspoon ground nutmeg
1/4 teaspoon ground cloves
1/2 teaspoon ground ginger
1/4 teaspoon salt
1 (15 ounce) can pumpkin puree
1 (12 fluid ounce) can evaporated milk
2 eggs, beaten
16 packets artificial sweetener

In a large saucepan, combine gelatin, cornstarch, spices and salt. Stir in pumpkin and evaporated milk. Let stand for 5 minutes to soften gelatin.

Cook and stir over medium heat until mixture bubbles; cook and stir for 2 minutes after bubbling. Remove from heat.

In a medium bowl, gradually stir about 1 cup of cooked mixture into beaten eggs. Return to remaining mixture in saucepan and cook over low heat for 2 minutes; do not boil. Remove from heat and stir in artificial sweetener after filling has cooled to 140° F.
 
Pour mixture into pie crust; cover and chill for 6 hours or overnight. Serve with whipped cream if desired.