A scientist is never off-duty, even in a fabulous Michelin-starred restaurant on Charlotte Street.
I think pretty much anyone with a cell biology background would have seen what I saw in this rhubarb confection:

Non-rhubarb-associated centrioles, diagram by Kelvinsong, Wikimedia Commons
But alas, my immediate dining companions consisted of a software system engineer and a cognitive neuroscientist, both of whom looked at me blankly – and with perhaps just a whiff of pity – when I excitedly pointed at my dessert and made little squeaky noises.
Do ribosomes look like cottage loaves, as we were taught at school? I’m asking for a friend.
No. Apples.
http://occamstypewriter.org/rpg/2013/02/10/on-biological-modelling/
Or pears?
Not profiteroles, then?
Mmm. Profiteroles.