Tarte tatin is a very popular French dessert that is basically the French take on the American apple pie. The tarte tatin flips the traditional apple pie on its back, though, literally: instead of the apples being baked into the pie and then covered with a layer of pie crust dough, the tarte tatin is an upside-down apple tart.
The apples are given extra flavor through caramelizing them with butter and sugar. Stacked onto a layer of sweet dough, the tarte tatin is not surprisingly really delicious. To learn how to make this French dessert, take a gander at this food tutorial.