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Squash & Leek Lasagna

WebMD Recipe from

Total Time: 165

Squash & Leek Lasagna

Grated butternut squash, pine nuts and sautéed leeks in a creamy white sauce are layered with sheets of whole-wheat pasta for this wintery variation on a vegetable lasagna. Any Parmesan cheese can be used in this casserole, but we recommend Parmigiano-Reggiano for its superior flavor.


  • 10 ounces lasagna noodles, preferably whole-wheat
  • 2 tablespoons unsalted butter
  • 4 large leeks, or 5 medium; pale green and white parts only, thinly sliced and washed thoroughly; about 6 cups
  • 1/2 cup all-purpose flour
  • 4 cups nonfat milk
  • 1 teaspoon dried thyme
  • 1 teaspoon salt
  • 3/4 teaspoon nutmeg, freshly grated
  • 1/2 teaspoon freshly ground pepper
  • 2 2-pound butternut squash, peeled, halved, seeded and grated using the large-hole side of a box grater
  • 6 ounces Parmigiano-Reggiano, grated using the large-hole side of a box grater
  • 1/4 cup toasted pine nuts


Step 1
Preheat oven to 350°F. Coat a 9-by-13-inch baking dish with cooking spray.
Step 2
Bring a large pot of water to a boil. Cook noodles until not quite al dente, about 2 minutes less than the package directions. Drain; return the noodles to the pot and cover with cool water.
Step 3
Melt butter in a Dutch oven over medium heat. Add leeks; cook, stirring often, until softened, about 6 minutes. Sprinkle flour over the leeks; stir well. Cook, stirring constantly, for 2 minutes. Whisk in milk in a slow stream and cook, whisking constantly, until thick and bubbling, 8 to 10 minutes. Whisk in thyme, salt, nutmeg and pepper. Remove from the heat.
Step 4
Assemble lasagna in the prepared baking dish by layering one-third of the noodles, one-third of the sauce, half the squash, one-third of the cheese, half the remaining noodles, half the remaining sauce, all the pine nuts, all the remaining squash, half the remaining cheese, all the remaining noodles, all the remaining sauce and all the remaining cheese. Cover with parchment paper then foil.
Step 5
Bake the lasagna for 50 minutes. Uncover and bake until bubbling and lightly browned, 30 to 45 minutes more. Let stand for 10 minutes before serving (or follow make-ahead instructions).

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