Red cabbage & caraway soup with horseradish

Melt the butter in a large stainless steel saucepan. Add the onion, celery and caraway with a pinch of salt. Sweat over a gentle heat for 8 minutes, until starting to soften. Add the tomato purée and cook for 1 minute, then stir in the cabbage and apple. Cover with a lid and cook for 15 minutes over a low heat, stirring occasionally.

Stir in the vinegar and sugar, then add the stock and salt; stir together. Cover, bring to the boil, then simmer for 30 minutes. Meanwhile, mix together the crème fraîche and horseradish in a bowl with a pinch of salt and set aside.

Using a stick blender, whizz the soup until as smooth as possible (if necessary, you can push it through a sieve with a ladle, until only a couple of spoonfuls of pulp remain in the sieve; discard the pulp). Season with black pepper and add more salt if needed. Ladle into bowls, swirl in a blob of the horseradish cream and sprinkle with the chives before serving.