Mix the yeast in with a little bit if water and let stand until frothy. Then mix together the flour and the rest of the water and add the yeast mixture. Knead until you get a soft dough. Let rise in a warm place for about an hour and a half. Now roll the dough flat and sprinkle the olives and feta cheese over one half.
Fold over and roll again, taking care that the olives don't burst through the surface of the dough.
Brush the top with olive oil.
Preheat your oven to 450 degrees. Put a large baking sheet into the oven for 10 minutes, then transfer the bread to the warmed baking sheet. Bake for four to six minutes, or until the bread starts to puff up and forms a pale golden crust.