Heat the butter and oil in a large saucepan on a medium heat, add the onion, celery and carrot and fry until tender, without turning golden, about 10 mins. Add the bay and garlic, and fry for a minute before adding the tomatoes and stock. Simmer for 10 mins, stirring occasionally.

Remove the bay leaves, and blend the soup in a liquidiser or with a stick blender until smooth. Season well and add the smoked paprika, sugar and vinegar to balance the soup with sweet, smokiness and a little acidity.

For the salsa, crush the garlic with a pinch of salt using a pestle and mortar. Halve and deseed the chilli and chop roughly. Add to the mortar with the coriander and olives and bash, gradually adding the oil and vinegar until you have a rough paste (it should be chunky). Mix in the preserved lemon, then stir in the brine from the jar to taste.