It is true and this is a real thing. https://en.wikipedia.org/wiki/Toast_sandwich?wprov=sfla1

Well now I have a delicacy called the toast sandwich.

Delicacy is maybe not the word I'd use, but it certainly exists

That actually sounds kind’a dynamite.

Sweden: hold my sandwich cake!

Smörgås tårta.

I've not heard of anyone else making such a thing, but not surprised it does exist. However, I can 1-up that with my childhood creation - the triple fold sandwich. One slice of buttered bread, one slice of buttered toast & one slice of butter fried bread. Fold each one in half, overlapping half of the adjacent piece. You get a mix of three different bready textures & flavours in each bite. I haven't made it in a few decades so I may not enjoy it so much now, but it was good at the time!

It's actually an ok snack. I made one after seeing it mentioned i line a while back. The combination of textures is nice.

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As a Brit I’ve never heard of such a thing. Sounds awful like putting a pie on a muffin (bread roll, barm cake) 🤮

https://youtube.com/watch?v=Q5gv0ZjVAtA