Picture of How to prepare onions
I've seen several people make a mess of cutting onions, and suffer from their lachrymatory effects. Why do people make and buy vegetable choppers? - Because a lot of people don't know how to cut them properly.

Cutting veg' needn't be difficult, it can be easy.

You need a good sharp knife.
It's worth having even only one knife with a decent stiff blade that can be resharpened. I found a Sabatier 3-pack on a market for 15 pounds (bargain!) I won't claim that Sabatier are the best, but they're good enough. If your knife isn't sharp you'll have trouble using it. Blunt knives are for spreading butter and such, not vegetable preparation.
(If you watch the videos, with their cheesy-tunes, notice how easily the knife goes through the onions - little force needed)

You also need a good solid surface to work on, I'm sure you know what a chopping board looks like, mine is made of wood.

If you have the option, choose onions which are hard / firm, softness is not good in onions.
Good onions should have little or no smell (before you peel them) - if they smell, they're not good.
Also check for visible signs of damage, if stored properly, onions should be dry on the outside and free from mould.

(I was a bit shaky due to illness, but I managed not to slice myself)
Wasagi5 years ago
 I usually just dice the ontions, or cut them vertcally. 

I don't caramelize onions, I sexify them.=, what great camp memories...
lemonie (author)  Wasagi5 years ago

Wasagi lemonie5 years ago
 Yeah, so, the only person who could cook, and subsequently kept us all from dieng, talked about sexifing the onions, and thus the phrase is now used by me.
BillMarvin6 years ago
To peel an onion, I find it easier if you partially cut through the top; then turn the onion 180 degrees and partially cur thru the root end. This way when you tear either end first you will not have to go through the machinations of removing the small pieces of parchment skin. With some practice you will be able to peel the onion with two actions.
sgsidekick6 years ago
Nicely done. I also learned that cutting the root end before the rest of the onion releases MORE of the tear-causing chemicals into the air! Once I started leaving that end on and just slicing the onion, it got better. It also helps to be slicing the onion next to a running tap. The water doesn't have to be on hard, just running. The water attracts the chemicals and bonds with them, keeping them from the eyes as well. I know this works, as it used to be my husband's job to cut onions. I simply could NOT deal with them! But now I'm cutting them with no problem!
lemonie (author)  sgsidekick6 years ago
Yes, sounds completely credible. I'm one of those people who doesn't hang about and doesn't complain if my eyes do sting...

ut_bruno6 years ago
On one of the popular food shows, they proved that putting the onions in the fridge first, reduced the crying and tears. I've always put my onions in the fridge and I've never had a problem. This show also talked about why onions make you cry. When you cut an onion it releases chemicals, when those chemicals mix with your tears, it makes sulfuric acid. If you use a sharp knife, then fewer onion cells are cut and therefore less chemicals are released. No wonder onions make you cry!! Sulfuric acid in your eyes sounds like torture!!
lemonie (author)  ut_bruno6 years ago
Being quick about the job helps too.

bosherston6 years ago
Ronnie, you were truly the master of cheese. These are skills that I really need to go and practice, impressed me anyways. Cheers for the 'ibble
SinAmos6 years ago
Oh, you are too much. Nice musical break downs. I have an assistant do my dicing.:)
canida6 years ago
When cooking in large quantity (and thus going for speed in preparation), I usually top and tail the onions first, then cut them in half top-to-bottom, then remove the outer peels. It all works - just depends on how fast you need to go, and how your assembly line techniques work.
I do that all the time now because I find it much easier. I also feel like I lose less of the onion-y goodness that way.
I do that too. Chop-peel-chop.
lemonie (author)  canida6 years ago
Yes, I see how that would work, thanks. I think that a lot of these things are habit, L
thepelton6 years ago
A trick my Mother taught me was to wash your hands in salt and warm water to remove the volatile onion oils.
lemonie (author)  thepelton6 years ago
Now that's one I've not heard of - thanks L