Combine all ingredients and knead into a ball. (See below for a sourdough starter recipe.) Cover and let rise for 4 hours. Stretch and fold 4 times every 15 min. for 1 hour.
Shape dough as desired. Place in mold and cover with a plastic bag. Refrigerate for 12 hours. Remove dough from mold. Bake covered at 400°F for 40 min. Bake uncovered at 350°F for 25 min.
Place on rack to cool.
Sourdough Starter
1 cup warm water
1 pkg. dry yeast (2 1/4 tsp.)
1/2 cup sugar
3 Tbsp. potato flakes
Mix all ingredients. Pour into quart-sized glass container. Cover loosely with plastic wrap. Let ferment on kitchen counter for 3 to 5 days. Refrigerate until ready to use in your favorite recipe.