Onions have dry, papery skin and vary in size, shape and colour. They should feel firm, and be void of any sprouts forming at the top, powdery patches, or black spots on the skins. Another way to test the freshness of an onion is to sniff it: if it doesn’t carry that typical ‘onion’ scent, you know you’re product is good.
All varieties of onions should be stored in a cool and dry space with plenty of ventilation. Although onions have a low rate of respiration, take care not to store them in plastic bags otherwise they will create a moist environment and breed mold.
Important to note: the urban myth that pre-cut onions will make you ill is just that – a myth! Tightly wrap leftover cut onions in plastic wrap, and keep them in your refrigerator. Be sure to use within the week.