spontaneously fermented rye bread
This recipe is from a friend's Lithuanian grandmother. This is how it is written:
1) pour boiling water over 1/3 weight rye flour and stir for thirty minutes until the mixture sweetens
2) cover to cool
3) add 2/3 of rye flour and knead
4) keep warm for 1 to 3 days until it rises
Never tried it myself. Think I'd get the jitters waiting around for the right moment to bake it.