Your allotment neighbours are hiding the nests in the coriander Pete, and flogging them to all the local restaurants and grocers - probably as coriander chocolate coated wasps.
Do you remember the chocolate coated ants of the sixties or seventies. Who had that idea, did they make any money at it and does anyone know someone that partook or the experience?
It seemed to catch the imagination for a couple of years and then faded away, without trace.
A few years back it was chocolate coated coffee beans. Very abrasive on the teeth.