How to store onions
The best way to store onions is to keep them in a cool, dry, and well-ventilated place, such as a pantry or a root cellar. Onions should be kept away from light and moisture to prevent them from sprouting or rotting. They should be separated from other fruits and vegetables, because they release a gas that can cause the other produce to spoil.
It's important to store onions in a way that allows air to circulate around them, for this reason it's recommended to store them in a mesh bag or a ventilated container. This will help to prevent the onions from becoming damp and mouldy.
If you have cut an onion and have leftover, it's best to wrap it tightly in plastic wrap or foil and store it in the refrigerator for up to 7 days.
Onions can also be stored in the freezer, but it's important to slice or chop them first. They can be stored in airtight containers or resealable plastic bags for up to 8 months in the freezer.
It's important to note that different varieties of onions have different storing preferences, for example, spring onions, shallots and red onions are best stored in a cool and dry place, while white and brown onions can be stored in a pantry or root cellar.