Ingredients

  • 8 oz dry Rigatoni pasta
  • 4 cups whole milk, divided
  • 2 cups water
  • coarse salt to taste
  • 1 large celery root (about 1 1/2 pounds total), peeled, cut into 2-inch cubes
  • 1 small onion or 2 shallots, diced
  • 6 tablespoons butter, cut into 6 pieces
  • 2 tablespoons flour
  • About 1/4 teaspoon freshly grated nutmeg
  • Ground white pepper
  • 1 teaspoon Herb de Provence
  • 1 1/2 cups Italian Fontina Cheese, shredded on the large side of grater
  • 2 tablespoons freshly grated Parmesan cheese
  • 2 tablespoons Panko bread crumbs

Method

  • Bring 2 cups milk, water and salt just to boil in heavy saucepan over high heat. Add celery root cubes; bring to boil. Reduce heat to medium and simmer until tender, about 30 minutes. Drain, discard cooking liquid.
  • Combine celery root and 2 tablespoons butter in a food processor; puree until smooth. Season to taste with salt and white pepper. Transfer puree to bowl, grate the nutmeg over it and mix in. Set aside.
  • Melt 2 tablespoons butter in a pan, add Herb de Provence, saute for 2 minutes and then add diced onion.
  • Saute until softened and just start to brown; sift the flour directly over the butter; stir to make a smooth paste and cook out the raw flour taste (about 3 minutes). Slowly add remaining 2 cups milk.
  • Simmer on a low heat stirring or whisking all the time until sauce thickens, about 5 to 10 minutes. Season to taste with salt and pepper. Remove sauce from the stove, add the Fontina cheese.
  • Add the pureed celery root; stir quickly and well. Keep warm.
  • Preheat oven to 375 degrees. F. Butter a casserole or glass baking dish. Cook Rigatoni al dente, in a large pot of boiling, salted water.
  • Drain and immediately add to the cheese and celery root mixture. Mix well and then pour into prepared baking dish. Spread evenly, sprinkle with Parmesan cheese and Panko bread crumbs.
  • Dot with pieces of the remaining 2 tablespoons butter. (At this point, you might cool the whole dish, then chill it and bake it later or even freeze up to 3-4 days).
  • When ready to bake; place on the middle rack of the oven; bake for about 45minutes until bubbly and the top is golden brown. Serve hot.