Bill's Sourdough French Bread

Yield:	12 Servings
Categories:	Sourdough, Breads

6	c	All-purpose flour; more if needed
4 1/2	ts	Yeast
1	tb	Sugar
1	tb	Salt
1	c	Water; very warm (120F)
2	c	Sourdough starter; room temperature
1	tb	Oil
		Yellow cornmeal
1		Egg white