Mashed Potatoes and Parsley Root

Homey and delicious, this should please all lovers of mashed potatoes. Parsley root adds a sweet, slightly herbal flavor to the potatoes, a suggestion of celery, parsnip, celeriac, and parsley all at once. I like a purée with texture (one that is downright lumpy, as a matter of fact), which is why I prefer to retain the thin peel of the parsley root and why I mash rather than sieve the vegetables. If you prefer a fine, smooth purée, peel the parsley root and press both vegetables through a