Joppie sauce

It is commonly offered in fast food restaurants in the Netherlands and Belgium, but is also available in grocery stores.

Joppie sauce was created by Janyne "Joppie" de Jager [d] of Annie's Snackbar in Glanerbrug, a village in the Netherlands on the border with Germany.

[2][3] Joppie sauce is a vegetable oil-based mayonnaise with onion and curry powder spices.

[4][5] The flavour is akin to that of a mild curry mayonnaise and the colour is a vivid turmeric yellow.

The sauce is commonly served with French fries and other deep-fried or fast food dishes.