Sourdough Starter - cooking recipe

Ingredients

1 pkg. dry yeast
1/2 c. sugar
1 c. lukewarm water
3 Tbsp. instant potato flakes

Preparation

Mix ingredients and leave, uncovered, on kitchen counter for 3 days, stirring occasionally with a plastic or wooden spoon. Starter does not rise, only bubbles.
Place in refrigerator for 3 to 5 days and feed with the following at least twice before using Starter to make bread.
After starting to make bread, feed every 3 to 5 days.
Will last a long time.