The last time I tried to do this it was from a US blog and used black walnuts. I've just opened a jar, and they're horribly salty. Only just about edible, and I can normally eat them like sweets.
I find Opie's a little sweet, and too expensive where I live. However, I have a walnut tree and loads of vinegar brewing ready for May/June and thinning out this year's harvest.
Anyone pickle their own, and can give me a recipe?
I did wonder if Jane Grigson's English Food has a recipe, but don't have it.