Fishy or fruity...or both?

Nigel Slater's mackrel with rhubarb and sherry vinegar. In a nutshell: pan fried mackerel served with oven baked rhubarb. The sherry vinegar comes into it at the end when you are rewarming the rhubarb in the pan before serving. Mine was a bit mushier than Nigel's, and didn't look pretty, but the taste combination was surprisingly good.