There’s something magical about the way the kitchen fills with the aroma of garlic and basil, instantly transporting me to an Italian trattoria. My latest culinary adventure brings together simplicity and flavor in a delightful twist on dinner—introducing the Pesto Chicken Stuffed Spaghetti Squash. This healthy dinner option is not only low-carb and keto-friendly but also a family-approved favorite, perfect for those busy weeknights when you crave something wholesome yet satisfying. Picture tender shredded chicken mingling with homemade pesto and melty cheese, all nestled inside perfectly roasted spaghetti squash. It’s a dish that feels indulgent while keeping health in mind. Curious to know how to bring this vibrant meal to your table? Let’s dive in!

Why is this dish a must-try?
Flavorful ingredients shine: The rich combination of homemade pesto, tender chicken, and creamy cheeses creates an explosion of taste that will leave you craving more. Healthy Twist: Enjoy a low-carb, keto-friendly meal that feels indulgent yet nutritious. Quick and Easy: Perfect for busy weeknights, this dish can be prepped and on the table in less than an hour. Family Favorite: Everyone loves it—kids and adults will savor every bite! Versatile Options: Switch it up with shrimp or add veggies for even more nutrition. Pair it with a side salad for a complete meal or try it with Cheesy Chicken Spaghetti to switch up your dinner routine!
Pesto Chicken Stuffed Spaghetti Squash Ingredients
For the Squash
• Large spaghetti squash – Acts as a fantastic, low-carb alternative to pasta—choose one that feels heavy for its size for the best flavor.
For the Filling
• Chicken breast (1 pound) – Provides lean protein; you can substitute with cooked turkey or shrimp for variety.
• Salt and pepper – Essential for enhancing overall flavor; use to taste.
• Pesto sauce (1 cup) – Infuses vibrant flavor and aroma; homemade is delightful, but store-bought pesto works well too when time is tight.
For the Cheesy Topping
• Parmesan cheese (1/4 cup) – Contributes a nutty flavor and creaminess; nutritional yeast can be a great substitute for a vegan option.
• Mozzarella cheese (1/4 cup) – Offers melty texture and rich taste; consider a dairy-free alternative if preferred.
This Pesto Chicken Stuffed Spaghetti Squash is deliciously flexible, making it a go-to recipe for health-conscious home cooks!
Step‑by‑Step Instructions for Pesto Chicken Stuffed Spaghetti Squash
Step 1: Preheat Your Oven
Begin by preheating your oven to 375°F (190°C). This temperature is essential for roasting the spaghetti squash and chicken to perfection. Meanwhile, gather your baking sheet lined with foil, making clean-up a breeze. The foil will help the spaghetti squash roast evenly and capture all those delightful flavors as they meld together.
Step 2: Prepare the Spaghetti Squash
Carefully cut the large spaghetti squash in half lengthwise using a sharp knife. Scoop out the seeds and stringy insides—you want a clean base for your filling. Once cleaned, place the squash halves skin-side down on the prepared baking sheet. It’s important that they’re facing down to prevent moisture from making them soggy while roasting.
Step 3: Season and Place the Chicken
Next, take the chicken breast and cut it into halves. Season both sides with salt and pepper to enhance their flavor. Lay the chicken pieces on the same baking sheet as the squash, ensuring they have enough space to cook evenly. The chicken will absorb some of the flavors from the squash as they bake together, creating delightful synergy.
Step 4: Bake the Squash and Chicken
Slide the baking sheet into the oven and bake both the Pesto Chicken Stuffed Spaghetti Squash and chicken for about 45 minutes. After 30 minutes, it’s a good time to check the chicken to ensure it’s fully cooked—juices should run clear when pierced. The squash will be done when it feels tender and can easily be scraped into noodle-like strands with a fork.
Step 5: Scrape the Squash into Strands
Once cooked, remove the spaghetti squash and chicken from the oven. Let them cool briefly, then use a fork to scrape the flesh of the squash into strands. This process transforms the squash into a pasta-like texture, which is perfect for holding all the flavors of the filling. Set the strands aside in a large mixing bowl while you prepare to combine them with the chicken.
Step 6: Combine Chicken, Squash, and Pesto
Dice the cooked chicken into bite-sized pieces and add it to the bowl with the spaghetti squash strands. Pour in the pesto sauce, stirring everything together until well combined. This is where the magic happens—each strand will be coated in the vibrant flavors of your homemade (or store-bought) pesto, making each bite utterly delicious.
Step 7: Stuff the Squash Halves
Spoon the chicken and pesto mixture back into the hollowed spaghetti squash halves, generously filling each one. Make sure to pack it neatly, so every bite is packed with flavor. This step not only looks visually appealing but also ensures you get a hearty serving in each squash boat when it’s time to dig in.
Step 8: Top with Cheeses and Broil
Sprinkle the mozzarella and parmesan cheese over the stuffed spaghetti squash. This cheesy topping creates a delightful, melty layer that adds creaminess to your dish. Place the baking sheet back in the oven and switch to the broil setting. Broil for about 3-5 minutes, watching closely until the cheese is bubbly and golden brown.
Step 9: Serve and Enjoy Your Meal
Once the cheese has reached that perfect golden hue, carefully remove the baking sheet from the oven. Let the Pesto Chicken Stuffed Spaghetti Squash rest for a few minutes before serving. The aroma is irresistible, and each bite promises a delicious adventure that’s healthy and satisfying, making it a delightful dinner option for the whole family.

Tips for the Best Pesto Chicken Stuffed Spaghetti Squash
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Microwave for Ease: Hitting the microwave for 5 minutes before cutting the spaghetti squash makes it easier to slice and scoop out the seeds.
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Check Doneness: Ensure the spaghetti squash is tender by testing it with a fork. If it pierces easily, you’re all set!
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Season to Taste: Don’t skimp on salt and pepper; they enhance the flavors of the chicken and pesto wonderfully. Adjust according to your preference!
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Add Extra Veggies: Feel free to sneak in some roasted peppers or cherry tomatoes for added color and nutrition in your Pesto Chicken Stuffed Spaghetti Squash.
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Mind the Broil: Keep a close eye while broiling the cheese—it can go from golden to burnt in the blink of an eye!
Make Ahead Options
These Pesto Chicken Stuffed Spaghetti Squash are perfect for meal prep enthusiasts! You can roast the spaghetti squash and chicken up to 24 hours in advance, allowing you to save valuable time during busy weeknights. Once cooked, let them cool before refrigerating in an airtight container. The filling can also be mixed separately (chicken, pesto, and squash) up to 3 days ahead. To maintain quality, store the cheeses separately to prevent sogginess. When ready to serve, simply stuff the squash with the filling, top with cheese, and broil for about 3-5 minutes until bubbly and golden. This way, you’ll have delicious, homemade comfort food ready with minimal effort!
How to Store and Freeze Pesto Chicken Stuffed Spaghetti Squash
Fridge: Store cooked Pesto Chicken Stuffed Spaghetti Squash in an airtight container for up to 3-4 days. This ensures you can enjoy those delightful flavors throughout the week.
Freezer: For longer storage, wrap individual portions in plastic wrap and then place in a freezer-safe bag. It can last up to 2-3 months in the freezer without losing quality.
Reheating: Reheat in the microwave for about 2-3 minutes or in the oven at 350°F (175°C) until warmed through. Enjoy the comforting flavors again any time!
Thawing: For frozen portions, let them thaw overnight in the fridge before reheating for even heating and better texture.
Pesto Chicken Stuffed Spaghetti Squash Variations
Feel free to make this dish your own with some delightful tweaks and swaps that elevate every bite!
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Protein Swap: Substitute chicken with shrimp or turkey for a different protein flavor. The subtle sweetness of shrimp pairs beautifully with pesto.
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Add More Veggies: Toss in grilled zucchini or spinach into the filling for an extra nutrition boost. Think of these vibrant veggies adding a lovely contrast to the dish’s rich flavors.
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Vegetable Base: Replace spaghetti squash with bell peppers or zucchini boats for a fun twist. The sweetness from bell peppers complements the pesto wonderfully!
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Dairy-Free Option: Use cashew cream instead of cheese for a creamy texture without dairy. This not only keeps the dish light but also introduces a unique nutty flavor.
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Herb Infusion: Mix in fresh basil or spinach into the pesto for extra depth. The fragrant aroma will make your kitchen feel like an Italian trattoria!
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Spice it Up: Add red pepper flakes or jalapeños to bring a touch of heat to the dish. It’s amazing how a little spice can awaken your taste buds and make the flavors pop.
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Nuts Galore: Stir in toasted pine nuts or walnuts into the filling for a delightful crunch. Each bite will surprise you with various textures—comforting yet exciting!
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Themed Cuisine: Transform this into a Mediterranean delight by adding olives and feta cheese. Pairing it with a light side salad makes for a delightful, complete meal.
For more delicious ideas, why not try this Cheesy Chicken Spaghetti that everyone will love or explore the flavors in my Cajun Chicken Sloppy version? The options are endless! Enjoy crafting your ideal version!
What to Serve with Pesto Chicken Stuffed Spaghetti Squash
Enjoy this delightful dish alongside refreshing sides and indulgent complements that elevate your dining experience.
- Garlic Bread: An irresistible crunchy accompaniment that soaks up flavors, making every bite of your meal even more satisfying.
- Mixed Green Salad: Fresh greens tossed with a light vinaigrette add a crisp contrast to the creamy flavors of the stuffed squash. The bright colors and textures will entice everyone at the table.
- Roasted Vegetables: Serve a medley of roasted seasonal veggies for a earthy side that complements the pesto’s vibrant taste. Carrots, zucchini, and bell peppers can be excellent choices.
- Zucchini Noodles: For a fun, extra veggie twist, spiralized zucchini noodles provide a similar texture to spaghetti but keep it light and refreshing next to the savory squash.
- Crispy Brussels Sprouts: Their crunch and slight bitterness can balance the rich and creamy filling, creating a delightful contrast that excites the palate.
- Chardonnay: A chilled glass of Chardonnay offers a buttery, fruity note that pairs beautifully with the rich cheese and savory pesto flavors—bringing harmony to your meal!

Pesto Chicken Stuffed Spaghetti Squash Recipe FAQs
How do I choose the best spaghetti squash?
When selecting a spaghetti squash, look for one that feels heavy for its size and has a uniform skin tone without any dark spots. Firmness is key—squash that has slight blemishes or soft spots may not be fresh. A good squash should ideally feel solid with no bruises.
How should I store my Pesto Chicken Stuffed Spaghetti Squash?
Store the cooked Pesto Chicken Stuffed Spaghetti Squash in an airtight container in the fridge for up to 3-4 days. This keeps the flavors fresh and allows you to enjoy leftovers throughout the week. Just reheat it in the microwave or oven before serving!
Can I freeze Pesto Chicken Stuffed Spaghetti Squash?
Absolutely! To freeze, wrap individual portions tightly with plastic wrap, then place them in a freezer-safe bag. This method helps prevent freezer burn and can keep it fresh for up to 2-3 months. When you’re ready to enjoy it again, simply thaw overnight in the fridge and reheat.
What should I do if my spaghetti squash is undercooked?
If your spaghetti squash is undercooked, it won’t shred properly. Simply return it to the oven for an additional 10-15 minutes, checking occasionally until it’s fork-tender. When properly baked, the strands should form easily and have a pleasant texture.
Is this dish suitable for my gluten-free diet?
Yes! The Pesto Chicken Stuffed Spaghetti Squash is naturally gluten-free since it features no traditional pasta. You can enjoy it without any worries about gluten; just ensure the pesto sauce you choose is also gluten-free or make your own for an extra wholesome twist.
Can I add more vegetables to the stuffing?
The more the merrier! Absolutely add extra veggies like roasted peppers, cherry tomatoes, or even spinach to the filling. This not only boosts the nutritional value but also adds color and flavor, making your Pesto Chicken Stuffed Spaghetti Squash even more enticing.

Delicious Pesto Chicken Stuffed Spaghetti Squash Recipe
Ingredients
Equipment
Method
- Preheat your oven to 375°F (190°C).
- Carefully slice the spaghetti squash in half lengthwise and scoop out the seeds. Place it cut-side down on a baking sheet lined with foil.
- Cut the chicken breast into halves and season with salt and pepper. Place it on the baking sheet alongside the squash.
- Bake for about 45 minutes until the squash is tender and the chicken reaches an internal temperature of 165°F (75°C).
- Remove from oven, let cool slightly, and scrape the squash flesh into noodle-like strands.
- Dice the cooked chicken and combine it with the shredded squash and pesto in a large bowl.
- Spoon the mixture back into the squash halves, packing it in well.
- Sprinkle with mozzarella and parmesan cheese, then broil for 3-5 minutes until bubbly and golden.
- Remove from oven and let cool slightly before serving.

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