This beautiful side dish is a delightful spin on traditional mashed potatoes.
1-2 celery roots, trimmed, peeled and cut into 1-inch cubes
1-1½ pounds fingerling potatoes, peeled and cut into ¾-inch cubes
2 cups chicken broth or water
2 cups whole milk
3 garlic cloves, peeled
3 thyme sprigs
1 bay leaf
4 tablespoons unsalted butter, at room temperature
Sea salt and fresh ground pepper
1. Combine first 7 ingredients in heavy large pot. Add enough water to cover. Sprinkle with salt. Bring to boil, reduce heat to medium, and simmer with lid slightly ajar until vegetables are tender, 15 to 20 minutes.
2. Drain; return to pot. Discard thyme sprigs and bay leaf. Stir over medium heat to dry vegetables. Using potato masher, mash the vegetables until coarsely pureed and then add in the butter. Season with salt and pepper and serve warm.