PB&O

Meh. I'd try it, if the peanut butter is not sweetened. Just love onion in a sandwich so much, and don't like the peanut butter and jelly at all.

That looks awful!
You just slice the onions and you get flat little circles prefect for sandwiches. You don't need to chop them up like that. It's not a hot dog.

Eh, I would try it. I don't think it would taste -great- but could be a unique flavor I hadn't considered before.
- I just keep thinking of Kung Pao. It's got onions and peanuts in it with an overwhelming peanut oil/butter flavor that permeates the whole dish.

I've never thought to add onion to pb toast, but Id be willing to try, (Dont knock it till you tired it?) the most questionable thing in this is, is that the floor?
- If guess it’s a wooden countertop or cutting board?
  
  Could be a wood counter top, seems a bit large for a cutting board?

My uncle's favorite sandwich is onion and strawberry jelly.
- Challenge accepted! What type of onion does he prefer? Red?
  
  I do not know that he has a preference.

This doesn’t sound terrible? Maybe not good, but not awful? Especially with a very mild onion and slightly sweet variety.
- Take a vidalia onion, cook it down a bit and I think you'll have something.
  
  I have actually done this, 6/10, not horrible but not something I would actively make again unless situations were dire. It is slightly above average because it is better than what your brain is telling you while you're making it.

My favourite topping for fries is Patat Oorlog where you have mayonnaise on one side and peanut sauce on the other, with diced raw onions sprinkled on top. Based on that, this sounds delicious, especially if you put a squirt of sriracha on there too and ate it with potato bread.

This is only tangentially related, but in Wisconsin they have a local delicacy called a "Cannibal Sandwich" that consists of raw ground beef and onions, and this just looks like the vegetarian version of the Cannibal Sandwich to me.
Source: Lives in Minnesota, is vegetarian, is eternally curious
- Cannibal Sandwich? THATS A DELICIOUS METTBRÖTCHEN! EIN SEMMEL MIT KÖSTLICHER BAUARBEITERMARMELADE! DON'T CALL IT CANNIBAL SANDWICH!
  
  Oh I've never heard of that! My dad grew up in West Germany, and he would always have Braunschweiger and brown mustard on rye, which I sometimes liked sometimes didn't, but I'll have to get my meat eating roommate to try this Mettbrötchen and report back. Seems like a classic working class lunch

I actually prefer penut butter in savoury foods, so not at all offended by this sandwich (properly seasoned).

Hey, don't knock it!
We have a pretty decent snack around here, buttered toast topped with a bit of sliced onion and a pinch of salt, and a chonkily diced tomato on the side for zest!
Edit: well, in all fairness, the traditional snack uses preserved cooking fat obtained from roasting sausages and such (we roast the sausages at once when preparing stockpiles and store the fat in jars for later use in different dishes), but I prefer it with a nice and thick milk butter.

This was a minor plot point in the Little Monsters movie from the 80s. I never did try that sandwich.... maybe I'll give it a shot some day since I love both peanuts and onions.