Yes but Sauerkraut is not fermented fish entrails.
'Pad Thai' sauce is made with fermented fish entrails, and it's delicious.
Tomato-less pizza, similar to foccaccia, and hamburger helper style hamburgers were popular back then. Not much has changed, the stonebrick pizza ovens discovered in Pompeii pretty much have the same construction as new one's built in central Italy today.