Rather than serving expected mashed potatoes, use nutritious rutabagas, mashing them with buttermilk and seasoning them with a dash of nutmeg.
In a pot of boiling salted water, cook the rutabagas until fork-tender, about 15 minutes. Drain and mash using a large fork. Add the milk, buttermilk, vinegar, and nutmeg and mash until smooth. Season with salt and pepper and serve.