Sponge:
1/2 cup sliced potato
1/2 tsp. salt
1 tbl. white corn meal
1 tbl. flour
2 cups boiling water

Let mixture set 15 hours.  Keep warm.  Foam should form.  Pour water off top and discard potato.  Add enough flour to make consistency of cake batter and let rise until double.  Mix, then add to sponge:

2 cups flour
1/2 tsp. salt
2 tbl. sugar
Butter the size of an egg
2 cups warm water

Add in about 2 more cups of flour to make a soft dough and knead 20 minutes.  Place in 3 buttered loaf pans and let rise until double.  Bake about 40 minutes, starting at 400 degrees for 10 minutes and finishing at 350 degrees for 30 minutes.