HEALTH HAZARDS-1: Unused portions of Onions

Onions are a huge magnet for bacteria, especially uncooked onions.  You should never plan to keep a portion of a sliced onion.  It is dangerous to cut an onion and use it to cook the next day.  It becomes highly poisonous for even a single night and creates toxic bacteria, which may cause adverse stomach infections because of excess bile secretions and even food poisoning.