Pommes duchesse

Duchess potatoes

Place of origin	France
Main ingredients	Mashed potatoes, eggs

Duchess(e) potatoes (French: pommes de terre duchesse) consist of a purée of mashed potato and egg yolk, butter, salt, pepper, and nutmeg, which is forced from a piping bag or hand-moulded into various shapes which are then baked at 245 °C (475 °F) until golden. They are a classic item of French cuisine.

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Wikipedia