STEP 1: PREHEAT THE OVEN

Begin by preheating your oven to 400°F (200°C). This ensures that your butternut squash roasts evenly and develops a beautiful caramelization.

STEP 2: ROAST THE BUTTERNUT SQUASH

Peel, seed, and cut the butternut squash into cubes. Spread the cubes on a baking sheet, drizzle with olive oil, and season with salt and pepper. Toss to coat evenly and roast in the preheated oven for about 25-30 minutes, or until tender and slightly caramelized. Allow the squash to cool slightly before blending.

STEP 3: MAKE THE BUTTERNUT SQUASH SAUCE

Once roasted, transfer the squash to a blender or food processor. Add the vegetable broth and blend until smooth. Adjust the seasoning with salt and pepper to taste. This creamy sauce will serve as the base of your lasagna.

STEP 4: PREPARE THE SPINACH FILLING

In a medium bowl, combine the chopped spinach, ricotta cheese, shredded mozzarella, grated Parmesan, minced garlic, and a pinch of salt and pepper. Mix well until all ingredients are combined and set aside.

STEP 5: COOK THE LASAGNA NOODLES

If you’re using regular lasagna noodles, cook them according to the package instructions until al dente. Drain and rinse under cold water to prevent sticking. If using no-boil noodles, you can skip this step.

STEP 6: ASSEMBLE THE LASAGNA

In a greased 9×13-inch baking dish, spread a layer of butternut squash sauce on the bottom. Layer with 3-4 lasagna noodles, followed by half of the spinach filling. Spread another layer of the butternut squash sauce over the spinach filling. Repeat the layering process: noodles, spinach filling, and squash sauce. Finish with a final layer of noodles and the remaining butternut squash sauce on top.

STEP 7: ADD THE FINAL CHEESE LAYER

Sprinkle the top of the lasagna with the remaining 2 cups of shredded mozzarella cheese. This will create a beautifully melted, bubbly topping when baked.

STEP 8: BAKE

Cover the baking dish with aluminum foil (to prevent sticking, you can spray the foil with cooking spray). Bake in the preheated oven for 30 minutes. Then, remove the foil and bake for an additional 15-20 minutes, or until the cheese is melted and golden brown.

STEP 9: REST AND SERVE

Once baked, remove the lasagna from the oven and let it cool for about 10 minutes before slicing. This helps the layers set, making it easier to serve. Garnish with fresh basil or parsley for a pop of color.