I'm browsing through the collection of "Culinary Prints" at Academia Barilla when I come aross this image.
On the website it's described as "A rare representation of a women selling grilled vegetables outdoors." A nice, simple picture. No surprises in terms of cooking utensils or methods. No big deal. I'm about to go on to the next image when I take a closer look at what's in the customer's hands. For all the world, it looks like a sausage in a bun. Maybe it's just being served with a piece of bread? No, it definitely looks like the bread is cut down the middle, with the sausage between the halves.
Now the common belief is that sausage sellers first started putting sausages into split rolls sometime in the late 19th century, so I doubt my own eyes and post a link on a cooking mailing list. The quick consensus is that it does indeed look like a sausage in a bun. Then someone suggests that the caption on the etching might shed some light on things. My German is only good enough to know that it says something about "good fried sausages", but a better translation is provided moments later.
Here, a decent sausage is roasted for not much money, with which hunger can be appeased but not thirst.
This (thirst) can be appeased later as much as someone wants in a place where wine and beer is sold.
[translation courtesy of Emilio Szabo, via the SCA-Cooks mailing list]
So the notes are incorrect - the woman is selling sausages, not vegetables, and she is serving them in a bun. No sign of ketchup or mustard though.