Everlasting Yeast - cooking recipe

Ingredients

1 quart warm potato water
1 teaspoon salt
2 cups white flour or 2 cups wheat flour
1/2 tablespoon dry yeast
2 tablespoons sugar

Preparation

Mix all ingredients together in a bowl (do not use metal bowl or utensils).
Place mixture in a warm place to raise until ready to mix for baking.
Leave a small amount of mixture (approximately 1/3 cup) for a start for next time.
Between uses, keep in a covered jar in the fridge until a few hours before ready to use again.
Add same ingredients except yeast to the remaining start for the next baking.
By keeping the everlasting yeast start and remaking some each time, yeast can be kept on hand indefinitely.