Trim, peel and grate the kohlrabi. Alternatively, use a Benriner to evenly cut batons. Peel and grate the apples, trying to keep equivalent volumes of kohlrabi and apple.
Whisk cream into light pillows - this takes a minute or so by hand, and does not require an electric mixer. Stir in the lemon juice, seasonings and herbs. Fold in the grated kohlrabi and apple. Serve immediately.