Offer: magazine subscription
Try your first 5 issues for only £5 today and never miss our best recipes
Put the celeriac, carrot and apples in a steamer over simmering water for 15 mins or until tender.
Blitz to a purée in a food processor with a splash of milk to create a smooth texture. You may need to scrape the sides of the bowl a few times while blitzing to get a smooth consistency throughout.