Stir the yeast in the cooled water with a pinch of sugar and leave it to effervesce.
Knead a soft dough. Leave it to rise for 30 min., then divide it into 4-6 parts.
In a bowl, knead the mince, flavor it with the spices, divide it into as many parts as you have doughy parts.
With oiled hands, shape them into pitas the size of a plate, fold the edges inward to make a border. Distribute the mince on top. Smear the edges with beaten egg yolk, sprinkle on the sesame seeds.
Bake in preheated 338°F (170 °C) oven for 30 min.
Shortly before taking them out, sprinkle with grated cheese and return to the oven for 10 min. until reddened.
They're incredibly delicious with salad.