Stop putting your potato or sweet potato stock in the fridge. This can speed up the conversion of starch to sugar. As a result, your potatoes may be grainy after cooking. To store this type of product, simply place them in a cool place, away from moisture and light.
Store potatoes in a plastic bag with many small holes. The holes allow air circulation. Or store the potatoes in a dark place. In a bag draped with a kitchen towel to block the light. Don’t store potatoes in a place where they could get hot, such as under the sink or next to a major appliance. And don’t wash potatoes before cooking them. This will allow you to keep them for several weeks without changing their nutritional quality.