On occasion my father would slice a red onion about a fourth of an inch thick to be placed on a single slice of white bread with a little salt. I never had any real objection to this, but also never the motivation or adventure to give it a try. A couple of recent NYT articles have praised the raw red onion on bread and it's other forms. I had thought Dad was maybe just weird or maybe something he picked up in the service, but now I know there is an onion cult with similar behavior. It's now on my bucket list to try.
"...I predicted that maybe a few brave readers would join in agreement. But I was expecting mostly just reactions of distaste and disgust. What I did not expect was the overwhelmingly emotional response it elicited in so many for whom onions seemed to have unlocked an outpouring of memories... Others have hesitantly tried my combination of red onion, lemon juice and salt on white bread and emailed me to say I have changed their lives and their definitions of a midday snack...To eat an onion raw is to experience life itself on a microcosmic plane, complete with all the detritus, essences and odors that make up its presence.
https://www.nytimes.com/2021/09/15/insider/raw-onions-readers.html