Blend peaches and pineapples together until fairly smooth. Pour into a kettle. Add erythitol and cook for 10 minutes. Soften Gelatin in water. Add jello and softened gelatin to peach mixture. Cook 1 minute longer. Ladle into containers and cool. Freeze. 4 pints.
**This recipe can also be made with 8 cups blended peaches and omitting the pineapple.