Boil 1 1/2 cups water, ... mixing bowl, combine rye flour, white flour and yeast ... large, starchy, peeled potato in the water until soft ... substituted for the bread flour, but the dough will ... it will be dry.
Put initial starter in refrigerator ... to use in bread and return remaining starter to ... wheat flour. For rye bread use 4 cups plain ... a sharp razor blade.
Put water in large pan. Use potato water as part. Dissolve yeast ... add yeast mixture, rye flour and enough white flour ... about 45 minutes. Bread is done when it sounds hollow if tapped on the bottom.