In a large bowl combine 3 cups warm water, 1 ½ tablespoons yeast and 1 tsp sugar. Let mixture set for 5 minutes.
Add 3 cups flour. Stir. Set the bowl in a warm place for 8 hours. This is your starter.
Remove 1 1/2 cup of starter. Give to a friend with instructions.
Replace starter with 1 1/2 cup of flour and 1 ½ cup of water. Mix.
In a large bowl combine 2 cups flour with 1 ½ cup sourdough starter and ¾ teaspoon salt.
Cover bowl with a kitchen towel. Allow bread to rise. Turn dough out on a floured bread board. Knead until smooth. Cover with a towel to rest for 1 hour.
In a 400 degree oven, place dough on sheet. Bake for approximately an hour or until golden brown. Allow 30 minutes to cool before serving.