Sourdough Starter - cooking recipe

Ingredients

1 pkg. dry yeast, dissolved in 1/2 c. lukewarm water
2 Tbsp. sugar
2 1/2 c. all-purpose flour
2 c. lukewarm water
3/4 c. sugar
3 Tbsp. instant mashed potatoes
1 c. warm water

Preparation

Add this mixture to the original starter and let stand, lightly covered, overnight.