Martial 13.7 (tr. D.R. Shackleton Bailey):
If pale beans froth for you in a red pot, you can often say no to the dinners of the high-livers.
Si spumet rubra conchis tibi pallida testa,
lautorum cenis saepe negare potes.
(Lewis and Short, "kind of bean boiled with the pods") comes from Greek κόγχος
(Liddell-Scott-Jones, sense III = "soup of lentils boiled with the pods"). According to Andrew Dalby, Food in the Ancient World from A to Z
(London: Routledge, 2003), p. 252, it means pea soup. Dalby says, "There is no evidence for the usual translation of conchis
as 'beans cooked with the pods'."