stone soup
- folk story convincing strangers to share food (or food ingredients)
Wiktionary
noun
Etymology: Calque of Portuguese sopa de pedra, after a tale in which a traveller places a stone in a cooking-pot and tricks the locals into contributing ingredients; see “Stone Soup”.
- A traditional Portuguese thick soup typically made with pork and vegetables.
“In the village of Almeirim nearby, O Toucinho (M), serves the typical stone soup; a charming, friendly, country spot.”
“Sopa de pedra (stone soup) is a marvellously thick country soup of numerous vegetables and meats. Adding the stone is optional.”