Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   5                    egg yolks
     1/4  cup           granulated sugar replacement
   1      dash          salt
   2      cups          evaporated skim milk
   1      1 in piece    vanilla bean
   2      cups          lo-cal whipped topping (prepared)

Preparation:

Combine egg yolks, sugar replacement and salt in top of double boiler. Beat until frothy. Beat in milk and add vanilla bean. Cook and stir over simmering water until mixture is thick and vanilla bean is dissolved. Cool completely. With electric beater, beat well, and then fold in topping. Pour into freezer trays, cover with waxed paper, and freeze for 1 hour. Scrape into large bowl and beat until smooth and fluffy. Return to freezer trays. Cover. Freeze firm.