This comes from a trick my grandmother always uses.  Whenever she boils potatoes, she would always pour the water into a mason jar and put it in the fridge for later use.  My grandmother comes from a time with little money and poor access to resources.  So if there was something that she could use twice or as many times as possible, she would! The best way to get the best nutrition and health benefits from potatoes is to eat them whole (skin) and cooked in their natural state, such as baked. Sometimes this isn’t an option because you need to boil potatoes for mashed potatoes and other delicious types.  But…