Langoustine with herb butter

I had reasonably low expectations of today's lunch - it's hardly even a recipe really.  Nigel said that simple things sometimes take him by surprise but I didn't really believe him.  At my local fishmonger I could only buy a frozen pack of langoustines - 24 in a box.  There was only me for lunch and I only really wanted 4 so the fishmonger suggested I use these giant Spanish prawns instead - I bought 6 and otherwise followed Nigel to the letter.  And wow is all I can say to today's lunch - it was amazing.  If this had been served to me at a restaurant I'd have been delighted with the beautiful flavours I tucked into today - it was sublime and Nigel is right, sometimes the simple things are all you need.