Puy lentils appeared on nearly every choice of main course in the more up-market UK restaurants over the past 3 or 4 years. I can't STAND them!
The only flavour they seem to have, is whatever has been added to them during cooking!
I've had them served in a posh restaurant in the Highlands - decoratively laid on a plate beneath a piece of venison... I've had them with fish (yuk!), beef and lamb, too....
I'm glad the love affair chefs seem to have had with the things appears to be over, judging by the removal of lentils from a lot of the restaurant selections I've noticed recently