Understand 'pottage' as a historical food item, common in medieval times. The peasants often survived on pottage, made from whatever was on hand.
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Simple and Hearty
'Pottage' connotes humble, comforting food, not fancy cuisine. After a cold day, they warmed up with a simple pottage of root vegetables.
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Archaic Usage
Today, 'pottage' is rarely used for current dishes; it's archaic and mainly historical. Medieval fairs often feature pottage to give a taste of the past.