bread as a utensil

I'm looking for written information on how different cultures and culinary traditions have used and/or currently do use breads in place or in addition to utensils for eating. I have a feeling some cookbooks probably have short introductory sections that discuss this, but I don't know which. I'm especially curious about one--I think it's on flatbreads, but I'm not sure. It's written by a male/female couple, and I remember hearing them interviewed, but that's all I remember.
And I wasn't sure which forum made sense since this question isn't just about historical use or really about baking. So I chose this one as a compromise.

Any thoughts?