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Invisible Butternut Squash, Spinach + Mushroom Lasagna: A Cozy Fall Favorite

As the crisp air of fall settles in and leaves turn to warm hues of yellow and red, our kitchen transforms into a haven of comfort. Let me take you on a little journey—one filled with the warmth of melted cheese, the earthy essence of mushrooms, and the subtle sweetness of butternut squash. This Invisible Butternut Squash, Spinach + Mushroom Lasagna is not just a recipe; it’s an embrace on a plate, perfect for those chilly evenings when all you want is to curl up with a hearty meal. Trust me; this is the ultimate easy weeknight dinner that your family will love, and one you’ll definitely want to pin for later!

Why You’ll Love This Recipe

Comforting Flavor: Each bite of this lasagna is a warm hug, thanks to the creamy Boursin cheese and tender veggies.
Nutritious & Satisfying: With hearty butternut squash and spinach, this dish sneaks in nutritious ingredients effortlessly.
Perfect for Meal Prep: Make this ahead of time and have a delicious meal ready for those busy weeknights.
Vegetarian-Friendly: A delightful option for your meatless Mondays or any night you want to indulge without the meat.
Crowd-Pleasing: This dish is loved by both kids and adults—there’s something for everyone!

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

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

Step-by-Step Instructions

Preheat your oven to 400℉. Spray a 9×13 inch baking dish with olive oil to prevent sticking.
Heat 1 tsp 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 sliced mushrooms for 4-5 minutes until they are tender and slightly browned. Remove from heat and set aside.
Take your butternut squash, peel it, halve it, and remove the seeds. Slice it thinly to ensure it cooks properly.
In a mixing bowl, combine the Boursin cheese, eggs, and milk, whisking until creamy and well incorporated.
Add in the flour, baking powder, salt, garlic powder, onion powder, and nutmeg. Mix until smooth.
Gently fold in the minced parsley, sautéed spinach, mushrooms, and thinly sliced butternut squash.
Pour the mixture into the prepared baking dish, spreading it evenly. Top with shredded mozzarella and sprinkle grated parmesan cheese over the top.
Bake in the preheated oven for 40-45 minutes, or until the lasagna is golden brown and bubbly. The edges should be slightly crispy while the center remains tender.

Variations & Creative Twists

Add Zesty Flavors: Mix in some sun-dried tomatoes for a tangy twist that complements the creamy cheese beautifully.
Creamy Ricotta: Swap Boursin for ricotta cheese for a richer texture and even more cheesiness.
Herb Infusion: Experiment with different herbs—thyme or rosemary can provide a delightful aroma and depth of flavor.
Nutty Crunch: Top with panko breadcrumbs mixed with a bit of olive oil for an added crispy texture that contrasts nicely with the creamy filling.

Chef Emma’s Helpful Tips

Make-Ahead Magic: You can assemble this lasagna a day in advance and store it in the refrigerator. Just pop it in the oven when you’re ready!
Ingredient Swaps: Feel free to substitute the baby bella mushrooms with any mushrooms you like, or even throw in some roasted vegetables for extra flavor.
Slicing Tricks: Use a mandoline for perfectly even slices of butternut squash—this ensures it cooks evenly and blends beautifully into the dish.
Storage Suggestions: Leftovers can be stored in an airtight container in the fridge for up to 3 days, making for a perfect next-day lunch.

What’s Inside – Nutrition Breakdown

Serving Size: Approximately 1 cup
Calories: 310
Carbohydrates: 28g
Sugar: 5g
Fat: 18g
Protein: 12g
Sodium: 650mg

Frequently Asked Questions

Can I make this ahead?
Absolutely! Assemble it the night before and refrigerate. Just add a few extra minutes to the baking time.

Can I use different ingredients?
Certainly! Swap in your favorite veggies or cheeses to make it your own.

How do I store leftovers?
Store in an airtight container in the fridge for up to 3 days or freeze for up to 2 months.

How long does it last?
In the fridge, it’s good for about 3 days. If you freeze it, let it thaw in the fridge overnight before reheating.

A Cozy Closing Note

This Invisible Butternut Squash, Spinach + Mushroom Lasagna is a reflection of all things comforting. It’s a dish you’ll turn to again and again, especially when the weather turns cool and everyone craves cozy meals. So why not save this recipe to your favorites board? You’ll want it close at hand for your next kitchen adventure! Happy cooking!