Cozy Butternut Squash Lasagna With Havarti
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Butternut squash lasagna is pure comfort food, especially when the weather turns cool and dinner calls for something warm and filling. This version layers sweet roasted squash, creamy Havarti, and a rich white sauce for a cozy vegetarian meal that feels special without requiring fancy techniques.
The flavor comes from a few simple ingredients: butternut squash, fresh sage, Havarti, Parmesan, and a homemade béchamel made with butter, flour, 2% milk, and a little freshly grated nutmeg. The squash brings gentle sweetness, while sage adds an earthy note. Meanwhile, Havarti melts into a soft, creamy layer, and Parmesan helps brown the top.
Although this recipe takes time, the work is straightforward. First, roast the squash and briefly bake the sage. While they cool, make the béchamel, then puree the squash with butter and sage. Finally, build three layers of pasta, squash, Havarti, and sauce, then bake until hot and golden. The hands-on prep takes about 25 minutes, with the oven doing much of the rest.
Serve this butternut squash lasagna on a chilly night, at a family dinner, or as a hearty vegetarian dish for a potluck. It feeds eight, so it also makes a welcome make-ahead meal for a busy week.
Why You’ll Love This Cozy Butternut Squash Lasagna With Havarti
- Comforting and filling: Creamy sauce, tender pasta, and sweet squash make every serving satisfying.
- Simple ingredients: You can find the squash, fresh sage, Havarti, and other ingredients at most grocery stores.
- A lovely balance of flavors: Nutty Parmesan and savory sage keep the sweet squash from tasting too rich.
- Great for sharing: The recipe makes eight servings, so it works well for a family dinner or gathering.
- Easy to prepare in stages: Roast the squash and make the sauce ahead, then assemble and bake when you are ready.
Butternut Squash Tips
Choose a large butternut squash that feels heavy for its size and has firm, unblemished skin. A long neck and smaller seed cavity usually mean more usable flesh. If the squash is hard to cut, steady it on a cutting board and use a sharp, sturdy knife. Cut it in half lengthwise, scoop out the seeds, and roast it cut-side down until a fork slides easily into the flesh. Let it cool enough to handle before scooping it from the skin. For a smooth puree, process the tender squash with the butter and sage until no large pieces remain.
Options for Substitutions
- Sage: Use fresh thyme leaves instead, or try a small amount of dried sage. Dried herbs are stronger, so start with less.
- Havarti: Substitute fontina, mild Gouda, or mozzarella. Choose a cheese that melts well.
- Parmesan: Use Pecorino Romano for a sharper, saltier finish. If you use it, season the sauce carefully.
- 2% milk: Whole milk makes the béchamel richer. Unsweetened, unflavored oat milk can work as a dairy-free alternative, though the sauce may taste different.
- Butter: Use a plant-based butter alternative in both the sauce and squash puree. Check that it is suitable for cooking.
- Fresh lasagna sheets: Use enough dried lasagna noodles for three pasta layers. Cook them according to the package directions first, unless the package says they can go into the oven uncooked.
Watch Out for These Mistakes
Do not take the squash out of the oven just because the roasting time has passed. Squash size and oven differences affect cooking time, so check for tenderness with a fork. If the flesh still feels firm, roast it longer. Tender squash is easier to puree and gives the lasagna a smooth filling.
When making the béchamel, add the milk gradually and whisk as you pour. This helps prevent lumps. Keep the heat at a gentle simmer and continue whisking until the sauce thickens. Avoid a hard boil, which can make the sauce scorch or turn uneven.
Bake the sage leaves for only 3 to 4 minutes, and watch them closely. They should smell fragrant, not browned or burnt. Also, let the squash cool enough to handle before scooping it from the skin, and use care when processing warm ingredients.
Finally, spread the layers evenly and finish with béchamel and Parmesan. If the sauce is too thick to spread, whisk in a small splash of milk. Let the finished lasagna rest for several minutes after baking so the layers settle and are easier to serve.
What to Serve With Cozy Butternut Squash Lasagna With Havarti?
Because this lasagna is creamy and hearty, serve it with a crisp green salad dressed with lemon vinaigrette, or a simple arugula salad with sliced apples. Roasted green beans or broccoli add a fresh, savory side, while warm garlic bread is a good choice for soaking up extra béchamel. For a lighter meal, pair one vegetable side with the salad.
Storage Instructions
Store: Cool the lasagna, then cover the baking dish or place portions in airtight containers. Refrigerate for 3 to 4 days.
Freeze: For best quality, freeze individual portions or tightly wrap the cooled lasagna in a freezer-safe container. Freeze for up to 2 to 3 months. Thaw overnight in the refrigerator before reheating when possible. The texture may soften slightly after freezing.
Reheat: For the microwave, place a portion on a microwave-safe plate, cover loosely, and heat in short intervals until hot throughout. For the stovetop, warm a portion in a covered skillet over low heat with a splash of milk or water to keep it from drying out. You can also reheat a larger portion in a covered baking dish at 350°F until hot.
Recipe Info
- Preparation Time: 25 minutes
- Cooking Time: 1 hour 35 minutes
- Total Time: 2 hours
- Level of Difficulty: Medium
- Servings: 8
- Calories: 696 kcal per serving
Estimated Nutrition
Estimated nutrition for the whole recipe (without optional ingredients):
Per serving, expect approximately 650 to 750 calories, 25 to 35 grams of protein, 35 to 45 grams of fat, and 55 to 70 grams of carbohydrates. These are estimates, not lab-tested values. Actual nutrition can vary with the size of the squash, the brands of cheese and pasta, and the amount of salt used.
Ingredients
For the bechamel sauce:
- 6 Tbsp. butter
- 1/2 cup flour
- 4 cups 2% milk
- Fresh grating of nutmeg
- Salt and pepper to taste
For the lasagna:
- 1 large butternut squash
- Cooking spray
- 10 sage leaves
- 1 Tbsp. butter
- Salt and pepper to taste
- 6 large sheets fresh lasagna (or enough for three layers of pasta)
- 30 slices havarti cheese
- 1/2 cup parmesan cheese
Step-by-Step Instructions
Step 1: Roast the Squash and Sage
Preheat the oven to 350°F. Halve the squash lengthwise and scoop out the seeds. Spray the cut sides with cooking spray, then place the halves cut-side down on a rimmed baking sheet lined with foil for easy cleanup. Roast for 35 to 50 minutes, until tender. Spray the sage leaves with cooking spray and bake them on the same sheet for 3 to 4 minutes, until fragrant. Let both cool enough to handle.
Step 2: Make the Béchamel Sauce
Melt the butter in a saucepan over medium-low heat. Whisk in the flour and cook for about 2 minutes, whisking often. Slowly pour in the milk while whisking to keep the sauce smooth. Bring it to a gentle simmer and keep whisking until it thickens. Add freshly grated nutmeg, salt, and pepper to taste, then set the sauce aside.
Step 3: Puree the Squash
Scoop the roasted squash flesh away from the skin. Put it in a food processor with the butter, salt, pepper, and baked sage leaves. Process until smooth. Taste the puree and adjust the seasoning if needed. If you do not have a food processor, mash the squash well with a fork or potato masher, then finely chop the sage before mixing it in.
Step 4: Build the Lasagna Layers
Spread a thin layer of béchamel over the bottom of a 9-by-13-inch baking dish. Add a sheet of pasta, a layer of squash puree, and a single layer of Havarti slices. Spread béchamel over the cheese. Repeat the pasta, squash, cheese, and sauce layers two more times. Finish with the remaining béchamel and sprinkle the Parmesan evenly over the top.
Step 5: Bake Until Golden
Bake at 350°F for 35 to 45 minutes, until heated through and browned on top. If the surface needs more color, broil it for a few minutes, watching closely so it does not burn. Let the lasagna rest for several minutes before cutting into eight servings.
Conclusion
This cozy butternut squash lasagna layers roasted squash and sage with creamy Havarti, smooth béchamel, and a golden Parmesan topping. The steps are simple, the ingredients are easy to find, and the finished dish is generous enough to share. Try it for your next chilly-night dinner, then leave a comment with how it turned out or tell us which side dish you served alongside it.
Butternut Squash Lasagna
Ingredients
Method
- Preheat the oven to 350°F. Halve the squash lengthwise and scoop out the seeds.
- Spray the cut sides with cooking spray, then place the halves cut-side down on a rimmed baking sheet lined with foil.
- Roast for 35 to 50 minutes, until tender. Spray the sage leaves and bake them for 3 to 4 minutes until fragrant.
- Let both cool enough to handle.
- Melt the butter in a saucepan over medium-low heat.
- Whisk in the flour and cook for about 2 minutes, whisking often.
- Slowly pour in the milk while whisking to keep the sauce smooth. Bring to a gentle simmer, whisking until it thickens.
- Add nutmeg, salt, and pepper to taste, then set aside.
- Scoop the roasted squash flesh into a food processor with butter, salt, pepper, and sage leaves.
- Process until smooth. Adjust seasoning if needed. Alternatively, mash with a fork.
- Spread a thin layer of béchamel over the bottom of a 9-by-13-inch baking dish.
- Add pasta, squash puree, and a layer of Havarti. Spread béchamel over the cheese.
- Repeat layers two more times. Finish with béchamel and sprinkle Parmesan on top.
- Bake at 350°F for 35 to 45 minutes until heated through and browned on top.
- Let the lasagna rest for several minutes before cutting into servings.
