I've cooked wood ash, fermented wild berry, and wild mustard seed bread on a stone.
It gave me heartburn and tasted not so great - but I did NOT die. LOL.(Warning: Do not try this one at home).
Maybe some other kind of seed would have been less painful.
I really, really like natural gas ranges, and electric (non-convection) ovens. Along with all the other nice tools. I like wood fired ovens for breads.
I can do the hard way... but it sucks to do it right.
I've got wheat and rye in the yard that I put out every year and let go to seed, so I'd rather not do the acorn bread (can.. but it sucks).
/johnny