Kolach (cake) - Wikipedia
https://en.wikipedia.org/wiki/Kolach_(cake)
WEBA kolach, [1] from the Czech and Slovak koláč (plural koláče, diminutive koláčky, meaning "cake/pie") is a type of sweet pastry that holds a portion of fruit surrounded by puffy yeast dough. Common filling flavors include tvaroh (a type of cottage cheese ), fruit jam, poppy seeds, or povidla (prune jam).
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