Salad of John Dory with Blackcurrant Vinaigrette

I can hardly ever wait for the arrival of the first blackcurrants of the season. They are a fruit of tremendous versatility, and I do tend to get a little carried away using them. They always appear on my menus in at least three forms at the same time. This is just one of them; a salad full of the colours of summer, and with it a fish that is always at its best during the summer months.