From www.bbcgoodfood.com, Modified by Sarah Woutat
¾ pound celeriac (4 mini), peeled and cubed
1 pound carrots, sliced
2 eating apples, peeled and cubed
2 tbsp crème fraiche
½ tbsp butter
2 tbsp finely chopped parsley
Put the celeriac, carrots and apples in a large pan of water, bring to the boil and simmer for 20 mins until tender. Drain, tip back into the pan and mash roughly. Stir in the rest of the ingredients. Cover and keep warm until ready to serve.