LavenderBlue

Yes and no mayo.

Stitchit123

Does this mean when I use only half an onion I don!t need to toss the other half. That's what I always do as I only buy those white onions and around here those are at least baseball sized.[/QUOTE] You can chop and freeze the other 1/2 of onion for soups and sauces. At this time of year the prices are coming down on seasonal veg's so I chop up hot peppers-green peppers and onions and freeze them together in small zip bags - ready for a nice big pot of chili. I'm the designated chili chef so when I make a gallon pot this part is done.

meanmom

We have onions from our garden and we keep them most of the winter at room temperature. Some years they last until February. Never throw over leftover onion. I have a covered bowl we keep the leftovers in the refrigerator in. Some years the onions don't seem to keep as well so I chop them all up and freeze them. They are just fine for cooking. We also have a hard time using up a stalk of celery before it wilts. I chop it up and freeze it also.

ptquilts

A lot of foods will grow bacteria when left at room temperature. Mayo is not the culprit, you don't even need to refrigerate it for safety, but for quality. Mayo is an acidic food (made with vinegar or lemon juice) and commercial mayo, the eggs in it are pasteurized.

cashs_mom

I keep my onions in the frig, commonly only use part and have never tossed the rest. I've never been sick from this nor has my husband or anyone who has eaten at our house.

Geri B

I do believe the label states refrigerate after using....I don't think it's only for quality purposes, but never thought of that for the reason.......

Chasing Hawk

Same here, I keep onions in a bowl on the counter. After I peel one and unused portion goes into the fridge in a ziplock back.

Sandra in Minnesota

I have been putting cut onions in the fridge, in a ziplock bag for 50 years. Hmmmmmm

sinceresissy

I have never thrown away an unused onion. I just wrap it up and put it in the refrig. I can't imagine throwing the unused part away. The onions have been in the refrig for a long time. I have even frozen some chopped onions for later use.

Onebyone

I have never thought to throw away the onion I don't use. That seems ridiculous to me. I chop it and put in freezer to add to baked recipes. Same with bell peppers and celery. Pasteurized mayo does not have to be refrigerated. Homemade mayo does.