I used fuji apples rather than tart apples. It was good and not as tart. I made a second batch using a pumpkin left over from Halloween...not a "pie pumpkin." NO WHERE near as good. Tasted more like some kinds of squash/vegetable soup. Perhaps would have been appetizing had I not been anticipating the smoothness and sweetness of pumpkin soup.
Cutting the pumpkin into large chunks and microwaving till slightly tender made peeling and chopping MUCH easier. I cut large chunks and microwaved each for @4 minutes. Cut each chunk into strips then into chunks then cut peels off each chunk as putting them into bowl. Time-consuming, but not near as tedious.