Sourdough Bread - cooking recipe

Ingredients

1 pkg. dry yeast
3 1/2 c. warm water, divided
7 c. all-purpose flour, divided
1/4 c. nonfat dry milk
2 Tbsp. margarine, melted
2 Tbsp. sugar
2 tsp. salt
cornmeal

Preparation

Before starting your bread, rinse a 2 1/2-quart saucepan with 1 teaspoon soda in 1 cup boiling water.