Thanks, I had found this one too (and would love to make it), but was looking for one that used sugar free gelatin, etc. I tinkered around abit this morning and made an acceptable one with strawberry jello, frozen whole strawberries, nonfat milk, and lemon zest. Put in blender, then in glasses and cool. Very good. I can see a raspberry, and peach one in my future too.
Measure out all the water needed for gelatin. Heat about one third of that to boiling. Add gelatin and stir till dissolved. Cool till slightly thickening in frig. Add powdered non-fat milk (enough for all the water in whole recipe), 1 cup whole frozen strawberries for each 2 cups of water used, and grated lemon zest to remaining water in blender and mix. When blended, add thickening jello and whirrrrrrrr till frothy.
Pour into dessert glasses and refrigerate till set. Very good.