Warm a large bowl, pour 1½ c warm water into warmed bowl.
Sprinkle yeast over water. Allow to soften
Blend in sourdough starter, sugar, butter, salt and 2 c flour.
Stir in enough remaining flour to make a medium stiff dough.
Turn out onto a lightly floured surface.
Clean & grease bowl, set aside.
Knead dough until smooth.
Place in greased bowl, turning to grease all sides. Cover with cloth & set in warm place free from drafts and let rise.
Divide into 2 loafs. Brush tops with water and sprinkle with cornmeal.
Let rise again for about an hour.
Bake at 375º for 30-35 minutes.
