https://www.youtube.com/watch?v=7OddsPiuX4gI have a mental image of how panaderias must make their products here.
They start with a giant piece of sandwich bread stock and then send it through a CNC machine which mills it into different shapes before it goes into an oven and is then covered in syrup and/or injected with dulce de leche
I'm not saying that's how they make their products here, but when I saw your post related to a mental image - well, our girls showed this to me some time ago and it has stuck in my head...
La mano en la masa! Hehe.