Spaghetti Squash Casserole with Mushrooms & Goat Cheese

When the first chill of fall begins to weave through the air, there's a calling for cozy, hearty meals that warm both the stomach and soul. Enter my Low-Carb Spaghetti Squash Casserole with Mushrooms and Goat Cheese, a dish that reimagines comfort food in a way that feels decadent without the guilt. As I took my first bite, the creamy goat cheese sauce harmonized with earthy mushrooms and vibrant spinach, creating a symphony of flavors that even the pickiest eaters would adore.

This casserole isn't just about taste; it's a celebration of hope for anyone feeling disheartened by fast food and uninspired weeknight dinners. Nutrient-rich and gluten-free, it's the perfect antidote to fall hunger-or the ideal dish to impress friends at your next gathering. With a golden, crispy topping that begs to be dug into, this recipe elevates spaghetti squash to a whole new level. So grab your apron and let's dive into a wholesome, satisfying creation that will resonate around your dinner table!

Why is Spaghetti Squash Casserole with Mushrooms & Goat Cheese a Must-Try?

Flavor-Packed: This casserole features a creamy goat cheese sauce that beautifully complements the earthy mushrooms and fresh spinach, ensuring every bite is a taste explosion.

Low-Carb Delight: Perfect for those watching their carbs, this meal is an ideal substitute for traditional pasta dishes without sacrificing satisfaction.

Versatile Ingredients: You can easily customize it with your favorite veggies or cheeses, making it a dish that adapts to your pantry's needs.

Quick Preparation: With simple steps and a baking time of just 25 minutes, this recipe is perfect for busy nights when you crave something comforting yet effortless.

Crowd-Pleaser: Whether you're hosting friends or simply enjoying a family dinner, this casserole is sure to impress and become a household favorite.

Elevate your dinner game with this deliciously easy recipe and transform your weeknight meals into something special.

Spaghetti Squash Casserole with Mushrooms & Goat Cheese Ingredients

For the Casserole
• Spaghetti Squash - This is the star of the dish, providing a healthy, low-carb alternative to pasta.
• Olive Oil - Perfect for sautéing vegetables; feel free to swap in avocado oil for a higher smoke point.
• Cremini Mushrooms - Adds rich umami flavor; you can use button mushrooms or portobello for a twist.
• Shallots - Milder than onions and ideal for depth; yellow onions or leeks make good substitutes.
• Garlic - Essential for enhancing flavor; if in a pinch, garlic powder can work but fresh is best.
• Red Pepper Flakes - Offers a pleasant hint of heat; omit if you prefer it on the milder side.
• Fresh Baby Spinach - Brings color and nutrients; kale or Swiss chard can also be used.

For the Sauce
• All-Purpose Flour - Thickens the sauce beautifully; almond flour or cornstarch are great gluten-free options.
• Broth (Chicken or Vegetable) - Adds moisture and rich flavor; use water if necessary, but flavor will diminish.
• Milk (Unsweetened Cashew or Almond) - Creates a creamy consistency; any dairy or non-dairy milk works fine.
• Kosher Salt & Black Pepper - Essential for seasoning; adjust according to your taste preferences.
• Fresh Thyme Leaves - Adds a delightful herbaceous note; dried thyme can be used, just less of it is needed.
• Goat Cheese - Provides that signature creaminess and tang; feta or ricotta offers a different flavor twist.
• Butter - Used for crisping up the topping; olive oil or margarine works for a dairy-free version.

For the Topping
• Panko Breadcrumbs - Creates that irresistible crispy crust; swap in gluten-free breadcrumbs for a suitable alternative.
• Parmesan Cheese - Adds a salty flavor and extra richness to the topping; grated cheese is easy to incorporate.

With these ingredients, you're all set to create a delicious Spaghetti Squash Casserole with Mushrooms and Goat Cheese that will surely delight your taste buds!

How to Make Spaghetti Squash Casserole with Mushrooms & Goat Cheese

Preheat your oven to 375°F (190°C). While the oven warms up, halve the spaghetti squash, remove the seeds, and brush the cut sides with olive oil. Place it cut-side down on a baking sheet and roast until tender, about 30-40 minutes.
Sauté the mushrooms and shallots in a skillet over medium heat with a drizzle of olive oil. Cook until the shallots are translucent and the mushrooms have softened, around 5-7 minutes.
Add the garlic, red pepper flakes, and spinach to the skillet, stirring until the spinach wilts, which should take about 2 minutes.
Whisk together the flour and gradually pour in the broth and milk, stirring continuously. Allow the mixture to simmer gently until it thickens, seasoning it with salt, pepper, and fresh thyme to taste.
Stir in the creamy goat cheese, letting it melt into the sauce. Once combined, fold in the cooked spaghetti squash strands and mix gently.
Transfer the mixture to a greased baking dish. In the skillet, melt the butter and toast the panko breadcrumbs until golden brown, then mix in the Parmesan cheese before sprinkling it generously over the casserole.
Bake the casserole uncovered for 25 minutes, or until it's bubbly and the top is nicely golden. Allow it to rest for 10 minutes before serving.

Optional: Garnish with fresh thyme for an added touch of flavor.
Exact quantities are listed in the recipe card below.

How to Store and Freeze Spaghetti Squash Casserole with Mushrooms & Goat Cheese

Fridge: Store leftovers in an airtight container for up to 4 days. Reheat in the oven at 350°F (175°C) until warmed through, ensuring the crispy topping stays delightful.
Freezer: To freeze, first allow the casserole to cool completely. Wrap it tightly in plastic wrap and then aluminum foil for up to 3 months. Thaw overnight in the fridge before reheating.
Reheating: For best results, reheat the thawed casserole in the oven at 350°F (175°C) for about 25 minutes. If it's too dry, add a splash of broth or milk before covering with foil.
Portioning: Consider freezing individual portions for quick, easy meals later on. This way, you can enjoy a nourishing slice of spaghetti squash casserole anytime you need a comforting meal!

Spaghetti Squash Casserole with Mushrooms & Goat Cheese Variations & Substitutions

Don't hesitate to make this dish truly your own; it's all about using what you love!

Vegetable Boost: Mix in roasted zucchini or bell peppers for added nutrition and delicious flavors. The variety can enhance both texture and taste!
Cheese Change: Swap goat cheese for mozzarella for a milder flavor or sharp cheddar for an added kick. Each option creates a unique twist that's sure to please.
Vegan Option: Replace the goat cheese with a generous scoop of cashew cream and opt for plant-based milk and butter to make a completely vegan delight.
Nut-Free Note: If you're avoiding nuts, use oat milk or coconut milk instead of almond milk. This ensures everyone can enjoy the creamy consistency!
Flavorful Herbs: Experiment by incorporating fresh basil or oregano for extra aromatic flavors. These herbs add a lovely fresh quality to the casserole.
Spice It Up: If you like heat, increase the red pepper flakes or add a dash of cayenne for a spicy kick that can transform your dish!
Texture Twist: For an extra crunch, incorporate some chopped nuts like walnuts or pecans for additional texture on top of the casserole. Just be sure to check for allergies!
Pasta Alternative: Try using butternut squash or even sweet potato noodles for a different, savory base that similarly packs in that delicious comfort.

What to Serve with Spaghetti Squash Casserole with Mushrooms & Goat Cheese?

Serve this delightful casserole alongside bright and complementary sides for a well-rounded meal.

Garlic Bread: A savory garlic bread is perfect for soaking up any leftover creamy sauce, making each bite a taste of heaven.
Arugula Salad: A fresh arugula salad with lemon vinaigrette brings a peppery crunch that balances the richness of the casserole beautifully.
Roasted Vegetables: Colorful seasonal roasted vegetables enhance the dish's earthy flavors while adding a textural contrast that's enticing to the palate.
Crispy Polenta Fries: These crunchy bites not only add a fun texture but also provide a satisfying flavor balance to the creamy casserole.
Grilled Chicken: Tender grilled chicken seasoned with herbs offers a protein-packed option that pairs well, making this meal even more filling.
Herbed Quinoa: A light and fluffy quinoa dish seasoned with fresh herbs complements the casserole's richness while boosting the meal's nutritional value.
Red Wine: A glass of medium-bodied red wine enhances the earthy mushroom flavors and adds a touch of elegance to your dinner table.
Lemon Sorbet: For dessert, a refreshing lemon sorbet cuts through the richness of the main dish and cleanses the palate, leaving you satisfied yet craving more.

Expert Tips for Spaghetti Squash Casserole

Salt the Squash: Lightly salting the spaghetti squash before roasting enhances its flavor, making every bite of your casserole delicious.
Watch the Panko: Keep a close eye on the panko breadcrumbs while toasting; they can burn quickly and spoil the crispy topping you desire.
Prep Ahead: Roast the spaghetti squash up to three days in advance. Store it in an airtight container to save time on busy weeknights.
Adjust for Taste: Always season your dish gradually with salt and pepper; it's easier to add than to take away, ensuring the perfect balance of flavors.
Mix and Match: Don't hesitate to customize the Spaghetti Squash Casserole with Mushrooms and Goat Cheese by adding your favorite veggies or cheese for a personalized touch.

Make Ahead Options

These Spaghetti Squash Casserole with Mushrooms and Goat Cheese are perfect for meal prep enthusiasts! You can roast the spaghetti squash and store the strands in an airtight container for up to 3 days in the refrigerator. Additionally, you can prepare the creamy sauce with mushrooms and spinach in advance and refrigerate it for up to 24 hours; just be sure to let it cool completely before storing to maintain its quality. When you're ready to bake, simply combine the squash and sauce in a greased dish, top with panko and Parmesan, and bake according to the instructions. This way, you achieve delicious, comforting results with minimal last-minute effort!

Spaghetti Squash Casserole with Mushrooms & Goat Cheese Recipe FAQs

What's the best way to select a ripe spaghetti squash?
When selecting a spaghetti squash, look for ones that are firm and heavy for their size, with a smooth, shiny skin. Avoid any with dark spots or soft patches, as these may indicate overripeness or spoilage.

How should I store leftovers of the casserole?
Store your leftover spaghetti squash casserole in an airtight container in the fridge for up to 4 days. Refrigeration helps maintain its flavors and texture, and it's best reheated in the oven at 350°F (175°C) to keep the topping crispy.

Can I freeze spaghetti squash casserole for later use?
Absolutely! After the casserole has cooled completely, wrap it tightly in plastic wrap followed by aluminum foil. It will keep well in the freezer for up to 3 months. When ready to enjoy, thaw it overnight in the fridge before reheating.

What if my casserole looks too runny?
If your casserole turns out too runny, it might be due to excess moisture in the spinach or not allowing the sauce to thicken properly. To troubleshoot, you can simmer the sauce a bit longer before mixing it with the squash, or incorporate a little extra flour - whisk it with some broth first to avoid clumps.

Are there any allergens in this recipe to keep in mind?
Yes, this casserole contains dairy from goat cheese and milk. If you're preparing it for someone with dairy allergies, you can substitute the goat cheese with cashew cream and use plant-based milk and butter for a delicious vegan version!

Is there a way to customize the vegetables in the casserole?
The more the merrier! You can absolutely customize the casserole by adding your favorite vegetables like zucchini or bell peppers. Just sauté them along with the mushrooms and shallots until they soften for added nutrition and flavor!