Preheat the oven, with a pizza stone if using, to 400 degrees F. For the flatbread: Stretch each piece of dough thinly, dusting with flour. Roll out each dough. Transfer to a pizza peel or upturned baking sheet dusted with flour or cornmeal. Par-bake for about 4 minutes each. Reserve. For the apple topping: Set a large saute pan over medium-high heat. Add the butter and once foaming, add the apples and cook until lightly browned on the outside, about 2 minutes. Add the brandy to deglaze (take care as it may flame), and then add the brown sugar, golden raisins, lemon juice, vanilla extract, cinnamon and salt, and cook over low heat until the apples are tender and sauce has thickened slightly, 5 to 7 minutes. Remove from the heat and top the par-baked dough with the apple topping. Place back into the oven for another 2 minutes. Serve warm. To serve: Cut with a pizza wheel, dust with confectioners' sugar and serve warm with vanilla ice cream.
In the bowl of a stand mixer, dissolve the sugar in the warm water. Sprinkle the yeast on top. Let stand until foamy, about 10 minutes.
Add the olive oil and salt to the yeast mixture, then use the dough hook to mix in the flour. Mix until the dough comes together. Add more flour as needed and allow the machine to knead the dough until smooth.
Turn the dough onto a floured surface and knead until smooth. Place the dough in an oiled bowl and turn to coat the surface. Cover the bowl with plastic wrap and let stand in a warm place until the dough has doubled in size, about 1 hour.
Turn out the dough onto a floured surface. Divide and form the dough into 4 smooth, tight balls. Cover loosely with a floured kitchen towel and set in a warm place to rise again for 30 to 45 minutes. Once risen, use immediately or wrap and freeze until ready for use, for up to 2 weeks.