Sourdough Bread Starter - cooking recipe

Ingredients

1/2 c. lukewarm water (not hot)
1 pkg. dry yeast
2 c. warm water
1 Tbsp. sugar
1 Tbsp. salt
2 c. flour

Preparation

Mix warm water and dry yeast; let set 10 minutes.
Add warm water, sugar, salt and flour.
Mix all together.
Let this set 3 days (covered) at room temperature, stirring the mixture down daily, then put in refrigerator.