what went wrong?

when i was little, my grandmother always used to say "this is where the baker slept!" when we found a big "cave" like this in a bread ... to this day i cant get that image out of my head ...


i mixed two different kinds of flour. since i don't really know yet how that ancient wheat "purpurweizen" must be treated, i will have to experiment a little more. maybe more water? more time to rise? and definitely more kneading! yes, that's probably it.