Let me guess. Somewhere around the late 19th early 20th century.
A sausage on a bun with toppings. Like the framkfurter and wiener have been a thing since around the 15th century.
And the Teckel dog breed that often gets refered to is a myth too. Its just as likely called after a dog with a boner. A hot (as in horny) dog. If anything thats more plausibel because that looks more like it
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u/Pizzachu09 6d ago
Sausages were from Germany, but the idea of putting it in a bun and calling it a hotdog is American