This recipe comes from Jacki Passmore's All Asian Cookbook, published in 1978. The curry is hot, as it should be, but has amazing depths of flavour. I've tried ready made pastes and numerous Indian restaurant offerings and nothing comes close to it, although my sons recently holidayed in Fiji and discovered a similar version in an Indian restaurant - one son told me that he had found the second best Vindaloo. Must have been good - they went to that restaurant 2 nights in a row, and they only had 4 nights there. I use a coffee grinder to grind the spices.