Dissolve Yeast In Water, Then Mix In Starter. Stir In Sugar And Salt, Then Flour. Knead On A Floured Surface Until Smooth And Elastic. Place On A Lightly Floured Board And Cover. Let Rise For 90 Minutes Or Until Doubled In Bulk. Punch Down, Knead A Bit And Cut Into 2 Pieces. Shape Into Loaves And Place On A Lightly Greased Baking Sheet. Sprinkle With A Little Water And Let Double In Size. Bake In A 375 Deg. F. Oven For 30 Minutes, Or Until Golden Brown And Hollow Sounding When Tapped On Top.