<<Lavash is a round bread from, I believe, the Balkan area.
My attempt at making it fell flat--my yeast was too old, as
I recall (threw away the recipe in disgust).>>

In Sydney at least, lavash is not necessarily round. You can buy it in squares and it is a flat malleable bread which is used to make 'wraps' - ie spread your ingredients on it and roll up to eat.

Apparently (my partner works for Australia's second largest baker, though not in the factory) it also comes in yeasted and unyeasted versions. Sorry, but recipes are trade secrets - not that that will sto me testing yours!