Thank you Chromedome and Lisa.
Our food processor arrived yesterday and we made a small amount of the frozen banana mix.
I was supprised, it was better than I thought. I wish we had some cocoa powder but will get some in a few days time.
We liked the soft serve mix, it was all eaten so none to go in the freezer but we may add some sugar when we do.
We're looking forward to trying a pineapple version.
Thanks for the heads up and explanation of the astringency, may a bit of cocoa powder or fresh mint for flavourings may cover the banana version.
Cheers and Thanks,
Alex.