dreamerjules suggested I try this here.
Some time in the eighties or nineties (don't know the exact date) a factory in (I think) one of the Scandenavian countries had some sort of fire or explosion, halting pretty much all industrial production of hummus outside the Middle East. As a result there was a global hummus shortage for several months.
Can anyone find me the details of this - exactly when and where it happened etc.? It doesn't seem to be googleable easily.
Many thanks! Looking through the comments here, it looks like this was either wild exaggeration by the person who told me, or an incident remembered wrongly. In either case it isn't going to be much use for my story! Many thanks anyway.