Celery Root and Apple Salad

Apple, medium tart

Celery, fresh leaves

Celery root, medium

Celery stalks, medium

Flat leaf parsley, fresh

freshly squeezed lemon juice, freshly squeezed

Dijon mustard

Sea salt and freshly ground pepper

Apple cider or white wine vinegar

Olive oil, extra-virgin

Walnuts, toasted