Generally you want to see a shine on the tender surface of an onion, just below the crackly paper-thin skin. Vidalia onions are my favorite and they are especially good this time of year, so mild and sweet. However, I happened to have a lot of purple mixed on my palette, so I opted to paint these purple onions. While they look pretty on a salad or sandwich, purple onions tend to be too strong for my taste buds.
Did you know that putting a fresh onion in the freezer 15 minutes before cutting into it will reduce eye tearing/crying? This is one of my favorite kitchen hacks.