Sourdough Starter - cooking recipe

Ingredients

1/2 c. very warm water
1 pkg. yeast
2 c. very warm water
1 Tbsp. sugar
1 Tbsp. salt
2 c. plain flour

Preparation

Mix together 1/2 cup very warm water and the yeast.
Add 2 cups very warm water, sugar, salt and flour.
Place in a gallon jar and let it sit at room temperature for 3 days.
Stir once a day. Cover loosely, then use or refrigerate.
As you use recipe, take 1 cup and add back 1/2 cup flour plus 1 cup lukewarm water and 1 teaspoon sugar.
Let set out a day, then refrigerate.