In a large mixing bowl, combine the flour and yeast.
Add warm water, olive oil, and salt to the flour mixture.
Knead the dough until smooth and elastic.
Cover the dough and let it rise until doubled in size.
Punch down the dough and shape it into a flatbread.
If desired, top the flatbread with grapes and fresh rosemary.
Bake the schiacciata in a preheated oven until golden brown.
Slice and serve warm. Enjoy!
