Its not something I've ever heard of, but its a good example of how idiosyncratic regional food variations can be*. I remember how surprised my partner (from London) was to discover that in Northern England cheese (preferably Wensleydale) is eaten with Christmas cake/fruit cake.
And of course these are things that rarely mentioned in text, but are great for establishing time, place and feel (fashions work too). I did a whole subplot about coffee in one campaign, and in my Eberron campaigns the trenchcoat was the major fashion item long before it appeared in the official art. I found the menu from Heroes of the Borderlands a bit jarring, and I expect the contents of Bilbo's larder in the Hobbit seems odd to some. And PJ used the waistcoat to create a whole hobbit look.
*Cheese and apples are often eaten together in a Plowmans' lunch though.