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Warm Up with Invisible Butternut Squash, Spinach + Mushroom Lasagna

As the leaves begin to crinkle and turn, and the air takes on that crisp, cool bite of autumn, my heart yearns for those cozy dinners that wrap us in warmth like a favorite sweater. There’s something particularly magical about lasagna; layers of comforting ingredients melded together, bubbling happily in the oven. This Invisible Butternut Squash, Spinach + Mushroom Lasagna is a delightful twist on the classic, adding a nutritious punch while still being soothing to the soul. Perfect for an easy weeknight dinner or a gathering with friends, this vegetarian dish will fill your home with an irresistible aroma and leave your guests guessing about its secret ingredient. Trust me; this is one you’ll definitely want to pin for later!

Why You’ll Love This Recipe

Deliciously Creamy: The Boursin cheese creates a rich, silky base that contrasts beautifully with the tender lasagna layers.
Packed with Veggies: This dish is loaded with nutrient-rich ingredients—spinach, mushrooms, and of course, butternut squash—making it a wholesome meal.
Kid-Friendly: The “invisible” aspect of this lasagna means even the pickiest eaters will enjoy it without realizing they’re eating their veggies!
Easy Assembly: With just a bit of chopping and layering, this recipe comes together effortlessly, making it perfect for busy weeknights.
Freezer-Friendly: Make a double batch and freeze the extra for a quick meal later. It’s a lifesaver on those hectic days!

Ingredients You’ll Need for Invisible Butternut Squash, Spinach + Mushroom Lasagna

2 tbs olive oil
5 oz baby spinach, (rough chop)
20 oz baby bella mushrooms, (sliced)
1½ lbs butternut squash
5 oz Boursin cheese, (room temp)
2 eggs
1/3 cup milk
1/3 cup flour
1 tsp baking powder
1/2 tsp each salt, garlic powder, and onion powder
1/8 tsp ground nutmeg
3 tbs parsley, (minced)
1 cup shredded mozzarella cheese
2 tbs grated parmesan cheese

How to Make Invisible Butternut Squash, Spinach + Mushroom Lasagna

Preheat your oven to 400℉. Spray a 9×13 inch baking dish with olive oil to prevent sticking and give that golden crust a nice start.
Heat 1 teaspoon of olive oil in a large skillet over medium heat. Add the spinach and sauté for 1-2 minutes until just wilted. Transfer to a plate and set aside.
In the same skillet, add the remaining olive oil and sauté the mushrooms for 4-5 minutes until they’re tender and fragrant. Transfer to the plate with the spinach and set aside.
Peel, halve lengthwise, and deseed the butternut squash. Using a handheld mandoline, slice it into thin pieces (about 1/8 to 1/4 inch thick). This will create the beautiful layers in your lasagna!
In an extra-large bowl, combine the room temperature Boursin, eggs, and milk. Whisk together until smooth.
Gradually mix in the flour, baking powder, salt, garlic powder, onion powder, and nutmeg until incorporated. This creamy mixture is what will bind everything together.
Gently fold in the minced parsley, wilted spinach, sautéed mushrooms, and butternut squash slices until everything is well coated.
Transfer the mixture into the prepared baking dish, spreading it out evenly. Top with shredded mozzarella and grated parmesan, ensuring it’s all covered in cheesy goodness.
Bake for 40-45 minutes or until the top is golden brown and bubbly, filling your kitchen with a mouthwatering scent.

Variations & Creative Twists

Switch Up the Cheese: Creamy ricotta or tangy goat cheese can substitute the Boursin for a completely different flavor profile.
Add Some Zest: Add a pinch of red pepper flakes for a little heat or lemon zest for a bright, citrusy twist.
Mix in Other Veggies: Feel free to add other veggies like zucchini, kale, or even roasted red peppers for added flavor and texture.
Protein Boost: For those wanting extra protein, consider adding some cooked turkey or beef into the mix. Just sauté them with the mushrooms for an exciting twist.

Chef Emma’s Helpful Tips

Make Ahead: This lasagna can be assembled the night before, covered, and stored in the fridge until you’re ready to bake. Just add a few extra minutes to the cooking time.
Storage Suggestions: Leftovers can be stored in an airtight container in the fridge for up to 3 days. You can also freeze the uncooked lasagna for up to a month, perfect for those busy days when home-cooked meals are a challenge.
Slicing Tricks: For easy slicing, let the lasagna cool for about 10-15 minutes after baking. This will help the layers set, making it easier to cut clean pieces.

What’s Inside – Nutrition Breakdown

Serving Size: 1 piece
Calories: 360
Carbohydrates: 28g
Sugar: 4g
Fat: 22g
Protein: 18g
Sodium: 500mg

Frequently Asked Questions

Can I make this ahead? Yes! Prepare the lasagna the night before and bake it when you’re ready.
Can I use different ingredients? Absolutely! Feel free to customize with your favorite veggies or cheeses.
How do I store leftovers? Keep leftovers in an airtight container in the fridge for up to 3 days.
How long does it last? If frozen, it can last for up to a month. Just thaw it in the fridge before baking!

A Cozy Closing Note

This Invisible Butternut Squash, Spinach + Mushroom Lasagna is a warm embrace in the form of food—simple yet satisfying, loaded with flavors that dance delightfully on the palate. The creamy layers of cheese and vegetables create a comforting dish that’s perfect for family dinners or special gatherings. Save this recipe to your "Comfort Food" Pinterest board so it’s ready when you need a cozy treat! Happy cooking!