When was the last time you used chervil in the kitchen? It's one of those herbs which the British don't seem to use very much; which is a shame: "Gourmet's Parsley" (Anthriscus cerefolium) has a delicate, slightly aniseedy, or liquorice, flavour. It looks very much like Italian flat leaf parsley. The Romans were keen on the stuff, and it is supposed to be good for high blood pressure. Excellent in salads and with fish, and as a more sophisticated substitute for parsley.
Popular in France, it's relatively hard to find over here, although the larger branches of Sainsbury's are supposed to stock it. It would be a brilliant thing to try and grow in the garden. I'm going to try sowing it in terracotta pots which I'll place on our new brick steps leading out from the kitchen doors. It prefers cool moist conditions, and needs to be regularly harvested to stop it bolting, or going to seed.