Doing a multi-course tasting in a couple of weeks. One course is a play on fermented items...sourdough bread, accompanied with nduja, fermented hummus, and cultured butter. I have two gluten free diners. Any thoughts on a substitute for the bread? You could talk me into a GF bread (but I am not sold yet)...maybe other ideas? I need a vehicle for the accompaniments, and it should ideally play on the fermented theme.