The radish and apples give this salad a satisfying crunch. There's no need to peel apples—their colourful skin provides useful nutrients.
For apples that are to be used unpeeled, wash and wipe them thoroughly. Note: biting and chewing an apple stimulates the gums. The sweetness of the apple encourages an increased flow of saliva, which helps to reduce tooth decay by lowering bacteria levels in the mouth.