Cut the kohlrabi into bite-sized pieces and cook until the desired consistency is achieved. 5 - 10 minutes can be used as a guideline.
Hard boil the eggs.
Let the kohlrabi and eggs cool down.
Chop the onion, gherkins and radishes into small pieces.
Put all ingredients in a bowl, mix with about 4 tablespoons of cucumber water and the salad cream and season with salt and pepper. Chill in the refrigerator and serve at room temperature.
For the non-low-carb variant, cut an apple into small pieces and add it.
Note: A little sauce will collect on the bottom, this cannot be avoided.