Healthy Spaghetti Squash Au Gratin
If you’re looking for a dish that feels indulgent yet remains wholesome, then this Healthy Spaghetti Squash Au Gratin is just what you need! This recipe has quickly become a favorite in my kitchen. It’s rich, cheesy, and packs in the veggies—making it a delightful addition to any meal. Whether it’s a busy weeknight or a festive family gathering, this dish shines as both a comforting side and a light main course.
The beauty of this Healthy Spaghetti Squash Au Gratin lies not only in its flavor but also in how easy it is to prepare. You can whip it up without any fuss, and I promise your loved ones will be asking for seconds!
Why You’ll Love This Recipe
- Quick and Easy: This recipe comes together in just over an hour, making it perfect for those evenings when you want something delicious without spending all night in the kitchen.
- Family-Friendly: The cheesy goodness appeals to kids and adults alike, ensuring everyone at the table will enjoy it.
- Make-Ahead Convenience: You can prepare the mixture ahead of time and bake it just before serving. It’s great for meal prep or holiday gatherings!
- Nutritious and Wholesome: Packed with veggies like spaghetti squash and loaded with protein from Greek yogurt, this dish is both filling and healthy.
- Versatile Dish: Serve it as a side or add a salad for a light main course. It fits perfectly into various meals!

Ingredients You’ll Need
Let’s gather some simple, wholesome ingredients to make this scrumptious dish! Each element adds its own unique flavor and texture, resulting in a truly satisfying meal.
- 1 medium spaghetti squash
- 1 tbsp olive oil
- ½ cup diced onion
- 2 cloves garlic (minced)
- ½ cup plain Greek yogurt (or sour cream)
- 1½ cups shredded sharp cheddar cheese (divided)
- ¼ tsp salt
- ¼ tsp black pepper
- Optional: ¼ tsp paprika or dried thyme
Variations
One of the best parts about this recipe is how flexible it is! Feel free to get creative based on what you have on hand or your personal preferences.
- Add More Veggies: Toss in some spinach or kale for extra nutrition. They blend beautifully with the squash!
- Switch Up the Cheese: If you’re feeling adventurous, try using mozzarella or pepper jack cheese for a different flavor profile.
- Make It Spicy: Add some red pepper flakes if you like a bit of heat to your au gratin.
- Herb Infusion: Fresh herbs like basil or parsley can elevate the flavors even more—just sprinkle them on top before serving!
How to Make Healthy Spaghetti Squash Au Gratin
Step 1: Roast the Spaghetti Squash
Preheat your oven to 400°F (205°C). Slice your spaghetti squash in half lengthwise and scoop out the seeds. Roasting brings out its natural sweetness and transforms it into that lovely noodle-like texture we adore!
Step 2: Sauté the Aromatics
While the squash is roasting, heat a skillet over medium heat. Add your diced onions with a splash of olive oil. Cook until they soften—about five minutes—and then stir in minced garlic for one more minute. This step builds a flavorful base that makes every bite delicious!
Step 3: Shred the Squash
Once your squash is cool enough to handle, grab a fork and shred it into those fantastic noodle-like strands. This step is where all that hard work pays off—you’ll see how beautifully it transforms!
Step 4: Combine Everything
In a large bowl, mix your shredded squash with those sautéed onions and garlic, Greek yogurt, one cup of cheese, salt, pepper, and optional herbs. Stir well; you want every bite packed with flavor.
Step 5: Bake It Up!
Transfer your mixture into a greased casserole dish and top with the remaining half cup of cheese. Bake at 375°F for 20–25 minutes until it’s hot and bubbly with that beautiful golden top. The smell alone will have everyone racing to the table!
Step 6: Serve and Enjoy!
Let your Healthy Spaghetti Squash Au Gratin cool slightly before serving—it’ll be worth the wait! Whether you’re enjoying it as a cozy side dish or as part of a light main meal, I hope you love every bite as much as I do!
Pro Tips for Making Healthy Spaghetti Squash Au Gratin
Creating a dish that’s both delicious and healthy can sometimes feel daunting, but with these simple tips, you’ll be well on your way to mastering this recipe!
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Choose the right squash: Opt for a medium-sized spaghetti squash that feels firm and heavy. This ensures you get the best texture and flavor.
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Don’t skip the roasting: Roasting the spaghetti squash before mixing it with the other ingredients enhances its natural sweetness and gives it a wonderful texture, making each bite more enjoyable.
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Experiment with cheeses: While sharp cheddar is delicious, feel free to mix in other cheeses like mozzarella or gouda for a unique flavor profile. Combining different cheeses can elevate the creaminess and taste of your gratin.
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Add more veggies: For an extra nutrient boost, consider adding chopped spinach or kale to the mixture. Not only does this enhance the dish’s health factor, but it also adds beautiful color and flavor.
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Let it rest: After baking, allow the gratin to cool for a few minutes before serving. This helps it set up nicely and makes serving easier without it falling apart.
How to Serve Healthy Spaghetti Squash Au Gratin
This dish is not just about great flavor; how you present it can make all the difference! Here are some ideas to serve your Healthy Spaghetti Squash Au Gratin beautifully.
Garnishes
- Chopped fresh herbs: Sprinkle some finely chopped parsley or chives on top just before serving for a bright, fresh touch.
- Crushed red pepper flakes: For those who enjoy a little heat, a sprinkle of crushed red pepper flakes adds a delightful kick that contrasts nicely with the creaminess of the dish.
Side Dishes
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Garlic Roasted Broccoli: Toss broccoli florets with olive oil, minced garlic, salt, and pepper, then roast until crispy. The crunch and flavor complement the soft textures of the gratin beautifully.
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Mixed Green Salad: A simple salad with mixed greens, cherry tomatoes, cucumbers, and a light vinaigrette offers a refreshing contrast to the richness of the au gratin.
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Quinoa Pilaf: Cooked quinoa tossed with lemon juice, parsley, and diced vegetables creates a nutty side that pairs wonderfully while adding protein to your meal.
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Steamed Green Beans: Lightly steamed green beans drizzled with lemon juice provide a crisp and vibrant side that balances out the creamy gratin perfectly.
With these tips and serving suggestions in your back pocket, you’ll not only create an amazing Healthy Spaghetti Squash Au Gratin but also present it in style! Enjoy this comforting dish at your next meal gathering or as a wholesome weeknight dinner.

Make Ahead and Storage
This Healthy Spaghetti Squash Au Gratin is perfect for meal prep! You can easily whip up a batch ahead of time and store it for later, making weeknight dinners a breeze.
Storing Leftovers
- Allow the dish to cool completely before transferring it to an airtight container.
- Store in the refrigerator for up to 3-4 days.
- To prevent drying out, cover the dish with plastic wrap or a lid.
Freezing
- Portion leftovers into freezer-safe containers.
- Label with the date and freeze for up to 2 months.
- For best results, consider freezing without the cheese topping; add fresh cheese before reheating.
Reheating
- Thaw overnight in the refrigerator if frozen.
- Reheat in the oven at 350°F (175°C) for about 20 minutes or until warmed through.
- Alternatively, microwave individual portions until hot, stirring halfway through for even heating.
FAQs
Here are some common questions about this delicious dish!
Can I make Healthy Spaghetti Squash Au Gratin without Greek yogurt?
Absolutely! You can substitute Greek yogurt with a dairy-free alternative like cashew cream or coconut yogurt for a similar creamy texture.
How do I prepare Healthy Spaghetti Squash Au Gratin ahead of time?
You can prepare the entire dish ahead of time by following all steps until baking. Cover it tightly and store it in the refrigerator. When you’re ready to serve, simply bake when needed!
What can I serve with Healthy Spaghetti Squash Au Gratin?
This dish pairs beautifully with a light salad or steamed vegetables. It also makes a great side alongside roasted chicken or fish for a well-rounded meal.
Is Healthy Spaghetti Squash Au Gratin suitable for gluten-free diets?
Yes! This recipe is naturally gluten-free, making it a great option for those avoiding gluten in their meals.
Final Thoughts
I hope you find joy in preparing this Healthy Spaghetti Squash Au Gratin! It’s not just a delicious comfort food; it’s also packed with wholesome ingredients that make it a nutritious option any day of the week. Whether you enjoy it as a side or a main course, I’m sure it will become a favorite at your table. Happy cooking!
Healthy Spaghetti Squash Au Gratin
Indulge in the delightful flavors of Healthy Spaghetti Squash Au Gratin, a dish that masterfully blends comfort and nutrition. This recipe showcases the natural sweetness of roasted spaghetti squash, enveloped in creamy Greek yogurt and topped with melted cheese. It’s a guilt-free treat that everyone at the table will love, making it perfect for busy weeknights or festive gatherings. With its vibrant veggies and cheesy goodness, this dish stands as both a satisfying side and a light main course. Plus, it’s easy to prepare ahead, making meal planning a breeze. Get ready to impress your loved ones with this wholesome, delicious creation!
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Total Time: 55 minutes
- Yield: Serves approximately 6
- Category: Side
- Method: Baking
- Cuisine: American
Ingredients
- 1 medium spaghetti squash
- 1 tbsp olive oil
- ½ cup diced onion
- 2 cloves garlic (minced)
- ½ cup plain Greek yogurt
- 1½ cups shredded sharp cheddar cheese (divided)
- ¼ tsp salt
- ¼ tsp black pepper
- Optional: ¼ tsp paprika or dried thyme
Instructions
- Preheat your oven to 400°F (205°C). Slice the spaghetti squash in half lengthwise and remove seeds. Roast cut side down on a baking sheet for about 40 minutes until tender.
- In a skillet over medium heat, warm olive oil and add diced onion. Sauté for about 5 minutes until softened; then stir in minced garlic for another minute.
- Once the squash is cool enough to handle, use a fork to shred it into noodle-like strands.
- In a large bowl, combine shredded squash with sautéed onions and garlic, Greek yogurt, one cup of cheese, salt, pepper, and optional herbs. Mix thoroughly.
- Transfer the mixture to a greased casserole dish and top with remaining cheese. Bake at 375°F (190°C) for 20–25 minutes until bubbly and golden.
- Allow to cool slightly before serving.
Nutrition
- Serving Size: 1 cup (240g)
- Calories: 210
- Sugar: 3g
- Sodium: 350mg
- Fat: 12g
- Saturated Fat: 6g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 18g
- Fiber: 4g
- Protein: 10g
- Cholesterol: 30mg
