Is it true that using a leftover onion is dangerous?

This is not true unless it was to get moldy or something like that.

hi Patty.

Can Cut onion be used next day? 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. If, however, the onions are mushy or slimy or if they have a cloudy liquid around them, toss them, MacDonald cautions.

Is It Dangerous to Cut Onions a Day Before Cooking Them ...

https://www.livestrong.com/.../500096-is-it-dangerous-to-cut-onions-try-to-use-them-to-... Search for: Can Cut onion be used next day?

Can you save an onion after you cut it?A: Chopped or sliced onions can be stored in a sealed container in your refrigerator at the proper temperature of 40°F or below for 7 to 10 days (Source: USDA). For pre-cut fresh or frozen products, always use and follow manufactures "use by" dates.FAQs - The National Onion Associationhttps://www.onions-usa.org/faqsSearch for: Can you save an onion after you cut it?

you can read up more at this link.

Is it dangerous to cut up an onion one day and use it to cook with the...

Just put a cut onion in a jar in an empty room or in a room with a healthy person overnight and it will do the same.

NO IT IS NOT TRUE

http://www.bestfoodfacts.org/food-for-thought/leftover-onion

1.) get a stick of butter and cut a slab off.
2.)Rub the cut section of the leftover onion with the butter. Soften the butter ever so slightly if you need to, by letting it sit at room temperature for a few minutes.
3.) Place the onion on foil and wrap it tight.
4.) then place in a tupperware dish to keep you fridge from smelling like onion
5.)Store the onion in the refrigerator, the butter will act as a barrier and prevent the outside air from drying out your onion.

Here is another good reference http://www.ehow.com/how_8111893_store-cut-onions-refrigerator.html

Try using spring onions - much gentler than regular onions - that's what I use.

Try with some garlic mayonaise - very tasty with the more gentle onions.

BON APPITITE

The average side by side only has one fan, and it moves a lot of air. This air flows by the Ice maker and can color the taste of the ice cubes. Try storing any fragrant foods in the vegetable bin with some baking soda to solve this problem.