Went PYO today, bloody brilliant, DS loved it and we have piles of raspberries, blackcurrants and gooseberries which I know what to do with. But DP took it into his head to pick about a kilo of tummelberries. They taste yuk - kind of bitter and tangy - so I'm thinking jam, but does anyone about them and have any jam tips?
(have done google search - apparently they are a crazy blackberry/raspberry hybrid invented by a bonkers scottish research institute - but the wyndhamesque boffins involved didn't think to post any jam recipes)