Bread-Bakers v105.n051.8

I posted this Thanksgiving day so perhaps many missed it.

I am looking for a recipe for the flatbread made at Cosi's sandwich 
shop.  It is delicious and I suspect it is more the technique than 
the dough, having observed them make it.   It is rectangular, flat, 
with large crackles on top with salt and oil and baked directly on 
the stone floor of their oven.  It also has bubbles.   It is sold as 
is or split into 2 very thin crispy pieces for sandwiches.   Lovely!

Any help is appreciated.