Instructions: Puree 3 cups grapes; set aside. Coarsely chop remaining grapes; set aside.

Pour water into small saucepan; sprinkle with gelatin. Let stand 5 minutes.

Cook and stir over low heat until gelatin dissolves. Place mixture in bowl.

Combine yogurt and vanilla; gradually add to gelatin mixture and stir until smooth. Add sugar; mix thoroughly. Cover and refrigerate 30 minutes. Add pureed grapes; stir until well blended. Pour into ice cream freezer; freeze according to manufacturers directions. Halfway through freezing process, add reserved chopped grapes. Allow frozen yogurt to ripen for 1 hour.

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