Sprinkle 1 tablespoon salt and the cornmeal over potatoes. Add boiling water
and stir until salt has dissolved. Cover and keep warm from noon to the following
Drain off liquid into a large bowl. Add the baking soda, 1 1/2 teaspoons sugar
and 5 cups flour to the liquid. Stir until ingredients are well blended. This sponge
should be the consistency of cake batter. Set mixture in a warm place, and let rise
until light and full of bubbles. This requires about 1 1/2 hours.
Scald milk and cool to lukewarm.
Add shortening. Add milk and remaining flour
to sponge. Knead for 10 to 12 minutes and shape into 3 loaves. Let rise until light - about 1 1/2 hours.