Remove the leafy tops. Thoroughly wash the radishes and remove both ends of each bulb. Then, slice thinly.
Wash apple and chop into small pieces. Thoroughly wash spring onions and cut into small chunks or rings as well.
To create dressing, combine olive oil, water, mustard, and honey and mix well.
Put all ingredients in a bowl. Add dressing, season to taste with salt and pepper, and give it a good stir.