Peel the kohlrabi and cut into thin slices with a vegetable slicer. Line a large flat plate or platter with the kohlrabi slices and sprinkle lightly with freshly ground pepper. Mix a dressing from olive oil, white wine vinegar and cream horseradish. Possibly add a little water. Season with freshly ground pepper, salt and a pinch of sugar. Roughly chop the parsley and add to the sauce. Drizzle the salad sauce over the kohlrabi carpaccio. Roast sunflower seeds dry in a small pan without fat until they start to smell and sprinkle over the kohlrabi carpaccio.