"'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: