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Butternut Squash and Sage Lasagna Recipe

Savory Vegetarian Roasted Butternut Squash Lasagna

While the bulbs have started popping up, the cold weather is still in effect and I'm craving Winter comfort food. To feed that hunger, this weekend, I made a hearty and scrumptious butternut squash lasagna. It wasn't a fast process, but the finished product is rewarding.

Prepping a butternut squash can be a little intimidating, but if you follow my guide to peeling, scooping, and chopping, it will be a cinch. Once the butternut squash is roasted and tender, a couple quick whirls in the food processor will create a creamy texture.

The sage, thyme, and garlic bechamel takes a short time to prepare, and when that is done, the assembling begins. All of the flavors combine as it cooks, resulting in a deliciously decadent lasagna. If you want to warm up a cold evening, keep reading for the recipe.

Butternut Squash Lasagna

Butternut Squash Lasagna

Butternut Squash Lasagna


  1. For the squash:
  2. 2 large butternut squash, about 3 to 5 pounds
  3. 3 tablespoons extra-virgin olive oil
  4. 1 tablespoon finely chopped fresh sage leaves
  5. 1 tablespoon lemon thyme
  6. 1 tablespoon fennel
  7. 2 teaspoons salt
  8. 1/2 teaspoon freshly ground black pepper
  9. 1 teaspoon freshly grated nutmeg
  10. 2 cups ricotta cheese (or a 15-ounce container)
  11. 1 cup freshly grated Parmesan
  12. 2 large eggs
  13. 1 pound dried spinach lasagna sheets (about 24 sheets), each 6 1/2 by 3 inches
  14. Extra-virgin olive oil
  15. For the sauce:
  16. 1 quart whole milk
  17. 3 tablespoons unsalted butter
  18. 1 tablespoon sage, minced
  19. 1 tablespoon lemon thyme, minced
  20. 2 teaspoons minced garlic
  21. 1/4 cup all-purpose flour
  22. 1 teaspoon salt
  23. Freshly ground black pepper
  24. To assemble the lasagna:
  25. Butter, for dish
  26. 1 pound mozzarella, grated
  27. 1 cup freshly grated Parmesan


  1. Preheat the oven to 400 degrees F.
  2. Using a vegetable peeler, remove the squash's hard shell. Trim about 1/2-inch off the top and bottom ends so you can set each section of the squash flat on a cutting board. Cut the squash in half lengthwise. Scoop the seeds out with a spoon, and coarsely chop the squash into 1/2-inch chunks. Line a baking sheet with aluminum foil. In a bowl, toss the squash with the oil, sage, spice blend, and 1 teaspoon salt and fresh ground pepper. Spread the squash in a single layer on the baking sheet. Roast the squash in the oven until very soft and beginning to brown, 40 to 50 minutes, stirring once or twice. Remove the squash from the oven and puree in a food processor with fresh nutmeg.
  3. In a large bowl, mix the squash puree, ricotta, Parmesan, eggs, 1 teaspoon salt, and 1/2 teaspoon pepper. Cover and refrigerate the mixture until ready to use.
  4. In a large pot of boiling, salted water, cook the lasagna sheets until al dente. Drain the sheets and spread them on a baking sheet. Drizzle them lightly with oil and set aside.
  5. Prepare the sauce: In a large saucepan, bring the milk to a slow simmer over medium heat. In a large pot, melt the butter over medium-low heat. Add the sage and garlic to the butter, cook for 30 seconds, then add the flour and stir.
  6. Add about 3 cups of the milk, and whisk vigorously to prevent lumps. Bring to a boil, while whisking continuously. Add the remaining milk and whisk again. Add the salt, pepper, and nutmeg. Adjust the heat to low to maintain a slow simmer, and cook until the sauce coats the back of a spoon, about 5 minutes, whisking frequently. Remove the saucepan from the heat. Makes about 4 cups.
  7. Preheat the oven to 375 degrees F.
  8. Butter a 9 by 13-inch baking dish. Spoon a ladle of bechamel into the dish and spread to coat the bottom. Place a single layer of lasagna sheets on top of the bechamel.
  9. Spread some of the squash mixture evenly over the lasagna sheets and sprinkle about 2 tablespoons of mozzarella cheese and 1 tablespoon of grated Parmesan on top. Repeat this step until all ingredients are used, starting with 2 to 3 ladles of bechamel for each layer. Keep building the layers until the pan is full to about 1/4-inch from the top. Finish with cheese and sauce directly over the noodles.
  10. Bake in the middle of the oven for about 1 hour. Remove the cover, and continue cooking for another 15 minutes until golden brown and bubbling. Allow lasagna to rest before slicing. Serve warm.
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