"White sauce is a sauce that is fresh. It is the one that highlights the meat of the kebab the most," says Noé Lazare, the owner of the Gemüse kebabs in Paris.
Since yogurt is slightly acidic, it counterbalances the fat in the meat. "If you see the white sauce in a container like this, there's a good chance it's homemade," says Lazare. But if you see a can with "white sauce" written then it will be industrial.