The tangy topping starts as fermented bulgur and milk left to dry in the sun on rooftops — and the Bekaa's hot, dry summer climate, with clear days six out of seven in August, is considered ideal for curing it.
Kishk — a powder of fermented bulgur wheat and yogurt or milk, sun-dried on rooftops — is mixed with chopped tomato, onion, and olive oil, spread over thin dough, and baked hot and fast until the edges blister. Bekaa Valley bakeries fold it in half for a tangy, portable breakfast.