A zapiekanka (Polish pronunciation: [zapʲɛˈkaŋka] ⓘ; plural: zapiekanki, pronounced [zapʲɛˈkaŋkʲi]) is a toasted open-face sandwich made of a sliced baguette or other long roll of bread, topped with sautéed white mushrooms, cheese and sometimes other ingredients such as ham.

The Polish word zapiekanka comes from the verb zapiekać, which means "to bake a dish so that its ingredients combine, and a crispy, browned crust forms on top,"[a] and may refer to various casseroles and other foods prepared in this manner.

[2] A typical zapiekanka is made from one half of a baguette,[3] or any other long roll of white bread, cut lengthwise, as for a submarine sandwich.

They usually took the form of stands or travel trailers turned food trucks serving zapiekanki along with simple dishes of Polish cuisine, such as kiełbasa sausage, boiled ham hock or tripe soup, and American fast food staples, like hot dogs, hamburgers, ice cream, and French fries.

[6][7] Demand for zapiekanki fell with the reintroduction of the market economy in the 1990s, but they were still served by the few "small gastronomies" that survived the competition with large fast food chains.