Soused herrings

Oily fish are, of course, something we should all be eating lots of, and I, for one, get fed up with variations on a salmon steak. So I was very pleased to see herring fillets on sale the other day, and snapped them up. I more or less followed Jane Grigson's recipe for Bismarck and rollmop herrings (I'm still not sure which are which, or what the distinction is). The result wasn't as good as I'd hoped. It was as if I'd used malt vinegar, when in fact I'd used a mixture of cider and red vinegars; and the fish itself had an overcooked texture after only four days. I should think the way to solve both problems would be to dilute the vinegar. At any rate, they don't have the melting texture I was hoping for, and which I know is achievable, because that's what I got at Heston Blumenthal's pub on Wednesday evening. Back to the drawing board.

This is what I did:

Soak 12 herring fillets in a brine made with 120g salt and 1.2l water. Two to three hours. While this is going on, make the marinade from: 600ml wine or cider vinegar (I was forced to use a mix of both, because there wasn't enough of either), 1 tbsp pickling spice (with dried chillies), some peppercorns, & 3 bay leaves. Bring this slowly up to a boil and then leave to cool. Drain the herrings, put them in a 1l Le Parfait jar with a sliced onion, then pour on enough vinegar to cover. Leave for at least four days.

I didn't roll them up around gherkin and sliced onion (which, now I come to think of it, is probably the distinction between a rollmop and a Bismarck herring). I wonder whether they would have been more tender if that's what I'd done. On the other hand, HB's herrings were clearly pickled flat, but his marinade was much gentler. I remember donkeys years ago (at least a couple of decades ago) pickling some mackerel fillets in home-made raspberry vinegar; I've often thought I should do it again, but couldn't remember how I did it ... pretty much as here, I should think (although I have some dim memory of baking them first in tea). It'll have to wait until next summer.

For Scandinavian, German and Austrian readers, this is probably a very routine recipe - some advice would be very welcome, even if you have to consult your mothers and grandmothers!