A couple of months ago, Andy came back from work with eight large reduced-in-price fresh mackerel 'because I know you like your mackerel'. So kind. 'It needs eating now though, it won't last much longer'. There is only so much not-entirely-fresh mackerel a girl can eat, so I decided to try cold pickling it, as I believe they do in Scandanavia. (I might be wrong on this).Bit of a faff, but I had that holy glow one gets from preserving. No waste in this house! A month later, I tried some. I love rollmop herrings, but my fishy pickles were in a class of their own - quite sour and mushy, though I bravely ate the whole dish. The jar went to the back of the fridge, where I found it a few days ago. There was something about it I didn't quite trust - I may even have started a new eco-system. It smelled - very fishy, but I don't think it was off - just funny coloured in parts. Nonetheless, it has been disposed of.