Peel, slice and cook one small potato. Puree or blend with sugar, salt, 1 cup warm water (use potato cooking water) and 1/2 cup flour. Cover and let stand in very warm place (95 to 120 deg) for 24 hours. You can do this in an electric frying pan set very low, a food dehydrator, warm oven, yogurt maker or behind the wood stove (the authentic way).

Pour the above mixture into a warm bowl and add 1 Tbs sugar, 2 Tbs warm water, and 1-1/2 cups flour. Beat well by hand. Cover and let stand in a warm place for 24 hours.

Then add 1/3 cup scalded, cooled milk, 2 Tbl oil and 2 or more cups flour. Knead 5 minutes, adding flour as necessary. Place in well-greased loaf pan, turning loaf to grease top. Cover, let rise 24 hours or until double in size. Bake at 375 deg for about 45 minutes.