^ âeucatastropheâ (US) / âeucatastropheâ (UK) in Oxford Dictionaries, Oxford University Press.
For cooked onions, you can find one answer here: http://www.stilltasty.com/fooditems/index/17825. 1  3-5 days in the refrigerator. 2  refrigerate withing 2 hours of cooking. 3  refrigerate in covered container or wrap tightly with heavy-duty aluminum foil or plastic wrap.
For example, if you slice your onions on a cutting board that you also used to cut raw chicken, any bacteria from the chicken juice will be transferred to the onion. Using Precut Onions. Chopped or sliced onions, properly stored in the refrigerator, will keep for seven to 10 days, according to the National Onion Association.