2 lbs. celery root (also called celeriac)
1 tablespoon lemon juice
3/4 cup mayonnaise
1 tablespoon French Dijon mustard
Sea salt & freshly ground black pepper
1 tablespoon finely chopped parsley

1. Peel the celery root and grate with the large holes of a 4-sided grater. (Or cut into 1/-8-inch-wide juilienne strips)
2. Toss the celery root with the lemon juice.
3. Combine the mayonnaise with the mustard, season to taste with the salt and pepper.
4. Combine the celery root with the mayonnaise mixture.

Transfer to a serving bowl and sprinkle with the chopped parsley.