- For the dressing: Place lemon juice, honey, salt, mustard and oil in a jar with a tight lid and shake vigorously to form an emulsified dressing. Set aside.
- Using a food processor fitted with the shredding blade, or a box grater, shred the celery root and carrots.
- Place the shredded vegetables in a large bowl, mix in the chopped parsley.
- Pour dressing over the top and gently toss.
- Chill for at least 30 minutes before serving, to allow flavors to marry.