Peel the cucumber with a peeler and cut into small cubes. Season with salt and pepper.
Squeeze half a lemon and mix with the sour cream and the remaining ingredients in a separate bowl.
I prefer to use a herb vinegar and white pepper instead of black pepper, but it also tastes good with other things. If you use a slightly stronger vinegar, it is better to use a little less of it.
Then add the cucumber cubes to the cream sauce and stir well.
I usually let the salad sit in the fridge for a few hours, but this is not absolutely necessary.