Many foods, such as avocados, apples and potatoes, begin to discolour after they are cut and exposed to air. This is due to the flesh of these foods reacting with oxygen. Potatoes usually develop a grey or brown hue. This discolouration is not harmful, but robs potatoes of aesthetic appeal.
Cutting potatoes the night before you are cooking a meal can save time. A simple way to store cut potatoes prevents this colour change temporarily, allowing you to store the potatoes overnight.
Place the cut potatoes in a bowl. Fill the bowl with water, leaving only ¼ inch or less space at the top.
Add 1 tbsp of lemon juice to the water.
Place a lid on the bowl, if one is available. If you do not have a lid, use cling film to seal the top.
Place the bowl in the refrigerator, in an area easily accessed, where it won't get knocked against and tipped over.
In place of lemon juice, you can use vinegar in an equal amount.