A topping of creamy Gorgonzola, chewy-sweet dates, and salty prosciutto makes for a high-impact Christmas hors d'oeuvre.
Preheat oven to 450?. Lightly brush a large rimless baking sheet with oil. (Alternatively, use a rimmed baking sheet turned upside down.)
Divide dough in half. On a lightly floured work surface, roll and stretch dough to two 16-by-4-inch ovals (or as large as will fit on your baking sheet); transfer to prepared baking sheet. Dividing evenly, brush top of dough with 1 tablespoon oil.
Sprinkle dough with Gorgonzola, Fontina, and dates; season with pepper. Bake until crust of flatbreads is golden, 15 to 17 minutes.
Transfer flatbreads to a cutting board. Drape prosciutto on top of flatbreads, and cut crosswise into small triangles. Serve immediately.