Kohlrabi And Celery Root Purée Recipes

Steps:

• Place the potatoes, kohlrabi and celery root in a steamer above 2 inches of boiling water. Cover and steam 15 to 20 minutes, until tender.
• Drain, cover tightly and allow to sit for 5 minutes, to steam and dry out. Mash with a potato masher or through a food mill fitted with a medium screen. Add the yogurt and the butter and mix together until incorporated. Season to taste with salt and pepper.

Steps:

• Put the celery root, potatoes and garlic cloves in a soup pot. Cover with cold water and salt generously, then boil over medium-high heat until tender, about 15 minutes. Drain and press through a ricer or the large holes of a food mill, then return to the pot. (If you prefer a rough-textured purée, mash with an electric beater or a hand-held potato-masher.)
• Over medium-low heat, whisk in the milk or half-and-half until the thickness of the purée is to your liking. It shouldn't be too stiff. Whisk in the butter and incorporate. Taste for salt and adjust. Make sure the purée is heated through. May be made up to 2 hours in advance, held at room temperature, and reheated in a double boiler.

Steps:

• Preheat the oven to 375 degrees. In a small pot, bring 3 cups water to a boil. Remove from the heat, add the porcini and let sit for 30 minutes. Strain through a fine-mesh sieve set over a bowl and set aside. Rinse and chop the mushrooms.
• Fill a large bowl with cold water and add all but 2 tablespoons of the lemon juice. Peel, quarter and cut the celery root into 1/4-inch-thick slices and add to the water.
• Place a large, ovenproof pot over medium-high heat. Heat 1/4 cup of the oil, then add the leek, onion, garlic, thyme sprigs, bay leaf and a pinch each of salt and pepper. Sauté until the onions are translucent.
• Drain the celery root and add it to the onion mixture with the reserved mushroom broth and milk. Bring to a boil, cover tightly and transfer to the oven. Braise until the celery root is tender, about 40 minutes.
• Remove the bay leaf and thyme sprigs. Using a blender or immersion blender, carefully blend the mixture to a smooth purée. (For a finer texture, strain through a fine-mesh sieve.) Place the pot over low heat and simmer until it reaches the consistency of porridge. Add the remaining 2 tablespoons lemon juice and season to taste with salt and pepper.
• In a large skillet over medium-high heat, heat the remaining 1/4 cup oil. Add the fresh mushrooms and sauté until the water releases and evaporates. Add the rehydrated porcini and chopped thyme. Season with salt and pepper to taste.
• To serve, place a few spoonfuls of the purée on each plate and drizzle with truffle oil, if using. Top with mushrooms and Parmesan.