1 c. sugar
2 envelopes unflavored gelatin
dash of salt
2 c. skim milk
5 c. plain low-fat yogurt
1 tbsp. vanilla extract

Combine sugar, gelatin and salt in a medium saucepan; add milk and let stand one minute. Cook over low heat, stirring constantly, five minutes or until gelatin and sugar dissolve; let cool. Stir in yogurt and vanilla; chill. Pour mixture into freezer can of a gallon freezer. Serve immediately or let ripen 1 hour.

Yields 10 1/2 cups; contains 84 calories per 1/2 cup serving.