This bread is not made with yeast but with fermented potatoes. You will need to do the fermented potatoes first and it takes about 3 days if you are in a cold environment, about one day if it is a warm and sunny. The list of what to do is for the sunny method. If you have to do the three method you will have to "feed" each day: Peel, cut and boil potato in 1 cup of water. When boiled remove the potatoes and retain the liquid, set liquid aside until lukewarm. Pour 1 cup of warm liquid mixed with 1 teaspoon of sugar into the starter plant (made the day before) and mix well. Store again in a warm place to continue in the proving/fermenting process. Repeat this process on Day Three.