I saw a craft show a couple years back that featured making your own "fabric" by fusing together grocery bags. The concept is all about ironing plastic between parchment paper to make usable fabric for bags, etc. This gal made it seriously beautiful by using strips and shapes cut from colored bags. I've been dying to try it.
My girlfriend and I were chatting about it and she showed me this one that she bought a while ago. I like how it makes a nice little placemat too.
this great one from Chica and Jo, but decided to make a few changes. Hers was based on diagonal orientation and I wanted mine horizontal (thinking it might keep the sandwich a little fresher, but I'm not sure that matters).
Here's how mine came out.