Ukrainian/slovak pagac or pagach (puh-gahtch) is traditionally served at meatless meals as for advent, lent, and the beautiful christmas eve supper known as velija. Pagac is a flatbread with a potato or cabbage filling and makes an excellent vegetarian entre. Some people call this slavic pizza. The name shares the same origin in greek with focaccia, and like it would be baked simply in the fireplace or oven in eras past. This recipe uses a yeast dough to produce a springy bread base. That adds a significant amount of time to the recipe as the dough goes through two rises, but gives a very nice result.