Sourdough Bread

Sponge
1 Use the paddle attachments on your mixer.
2 Add the warm water and yeast to the large mixer bowl.
3 Stir to dissolve the yeast.
4 Add the starter and mix well.
5 Add 3 cups of the flour.
6 Beat for 2 minutes on medium speed.
7 Cover with plastic wrap and put it in a warm spot for 8 hours.
8 You can also put it in the refrigerator overnight after that if you  want a more sour flavor.
Bread
1 Fit the kneading hook on your mixer.
2 When the sponge is well risen and bubbly add the salt and one cup of the flour.
3 Add more flour, a little at a time, until the dough pulls away from the sides and comes together.
4 Knead it for 5 minutes, adding flour as needed to create a smooth, elastic dough.
5 Place the dough in a greased bowl, grease the top, and cover with plastic wrap.
6 Set in a warm place to rise - about 2 hours, or until double.
7 Don't punch dough down. Just divide it in half and form into loaves.
8 Let rise for another hour or two until the loaves have doubled.
9 Slash the tops and bake at 450F for 20 to 25 minutes.
10 Let cool before slicing.
11 .