From The Collaborative International Dictionary of English v.0.48:
Pottage \Pot"tage\ (?; 48), n. [F. potage, fr. pot pot. See
Pot, and cf. Porridge, Porringer.]
A kind of food made by boiling vegetables or meat, or both
together, in water, until soft; a thick soup or porridge.
[Written also potage.] --Chaucer.
[1913 Webster]
Then Jacob gave Esau bread and pottage of lentils.
--Gen. xxv.
34.
[1913 Webster]