"So with the first few BMOs I tried, I combined [the bread, butter, and cheese] into a sandwich, and ate quickly and efficiently with both hands."

"'That’s the burger method,' said Mr. Dyrholm, the Politiken critic. Two friends set me straight. 'It’s just, like, very, very important that you eat it like this,' said Emma Toft Kromann, holding it open-faced. 'If you see someone eating it like a burger, you know they’re not from here,' added Ophelia Ernland. A bolle med ost is the elevenses of a city caught between hustle and hygge...."

From a long NYT article that's just about how people in Copenhagen eat bread with butter and some cheese. The headline is "It’s Sliced Cheese on Bread. And It’s Rocking Copenhagen’s World. The Danish capital is obsessed with this stripped-down snack, and the city’s top bakeries won’t stop until they’ve perfected it."

I haven't seen "elevenses" for so long, I almost thought I didn't know the word. I do know it, but I looked it up anyway. Here:

Ha ha. "Fourzes." "Fourzes" does not, like "elevenses," have its own OED entry. (I do think "elevenses" is plural, so that's a quibble with "A bolle med ost is the elevenses.") 

Anyway, bread and butter and cheese. Perfect. Why do we even need to be reminded that it's a thing? There's a particular way that it's a thing — in Copenhagen.

ADDED: Wikipedia has an entry for "Elevenses." You've probably encountered the word in classic children's literature:

In A.A. Milne’s "Winnie-the-Pooh’’, Pooh arrives at Rabbit’s house for elevenses. When offered a choice between condensed milk or honey on his bread, Pooh responds “both – but never mind the bread.”

Paddington Bear often took elevenses at the antique shop on Portobello Road run by his friend Mr Gruber, for which Paddington would buy buns and Mr Gruber would make cocoa.

In J. R. R. Tolkien's The Lord of the Rings, elevenses is one of the many meals that is enjoyed by the Hobbits of the Shire, served daily between second breakfast and luncheon. In addition, a party is implied to be particularly lavish in that food was served "continuously from elevenses until six-thirty".