I've chosen a jelly roll from my stash, Cuzco by Kate Spain. Pattern is from the Moda Bakeshop, link here. It's called Sultry but more commonly known as a French braid quilt.
All 40 strips are used on the braid so I will need to source more fabric for sashing or go with a plain colour. I found half a metre on Etsy so the bindings sorted, and maybe a plain border will be ok, will find out soon enough.