1 pk Yeast

1 tb White sugar

12 c Bread flour

12 c Medium rye flour

2 c Whole wheat flour

1/2 c Unprocessed bran flakes

1 tb Caraway seeds

1 ts Salt

1 ts Instant coffee powder

1/4 ts Fennel seeds

1 c Water

2 tb Water

2 tb Molasses

2 tb Cider vinegar

1/2 oz Unsweetened chocolate

(I would cut back on that a bit) Cool the mixture to 105-115 degrees and add to dry ingredients. I suspect the exact ingredients don't really matter all that much. As long as the flour-to-liquid proportions are such as to make a dough of good consistency, the result will probably be highly edible.