Trim the base of each chicory head and, using a pointed knife, cut out the core. Slice the chicory very finely crossways, separate out the layers and put into a mixing bowl. Peel and grate the carrot into the bowl. Trim and chop the spring onions and add to the bowl. Peel, core and grate the apple into the bowl.
Sprinkle with castor sugar to counteract the sharpness of the apple, add th