Healthy Spaghetti Squash Au Gratin
If you’re looking for a dish that’s both comforting and wholesome, I have just the recipe for you: Healthy Spaghetti Squash Au Gratin. This delightful dish has become a staple in my kitchen because it feels indulgent while still being good for you. The way the roasted spaghetti squash mingles with creamy Greek yogurt and sharp cheddar creates a cozy, cheesy goodness that is hard to resist.
Whether it’s a busy weeknight or a festive family gathering, this Healthy Spaghetti Squash Au Gratin is perfect for any occasion. It’s quick to prepare and always earns rave reviews. Trust me, once you try it, you’ll want to keep this recipe close at hand!
Why You’ll Love This Recipe
- Easy to make: With just a few simple steps, dinner can be on the table in no time.
- Family-friendly appeal: Kids love the cheesy flavor, and they won’t even realize they’re eating their veggies!
- Make-ahead convenience: Prep it in advance and bake when you’re ready to enjoy.
- Packed with flavor: The combination of ingredients creates a rich taste that’s sure to please everyone.
- Versatile option: Great as a side dish or as a light main course.

Ingredients You’ll Need
These are simple, wholesome ingredients that come together beautifully to create the magic of Healthy Spaghetti Squash Au Gratin. Let’s gather them up!
- 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 things about this recipe is its flexibility! You can easily customize it based on your preferences or what you have on hand.
- Add more veggies: Toss in some sautéed spinach, mushrooms, or bell peppers for extra nutrition.
- Change up the cheese: Use mozzarella or pepper jack for different flavors and textures.
- Make it spicy: Add a pinch of cayenne pepper for a little kick, or top it with fresh jalapeños.
- Herb infusion: Fresh herbs like parsley or basil can brighten up the dish beautifully.
How to Make Healthy Spaghetti Squash Au Gratin
Step 1: Preheat the Oven
Preheat your oven to 400°F (205°C). This step is essential as it ensures that our spaghetti squash roasts perfectly and develops that lovely caramelized flavor.
Step 2: Roast the Spaghetti Squash
Slice the spaghetti squash in half lengthwise and scoop out the seeds. Brush the cut sides with olive oil and place them face-down on a baking sheet. Roasting it at high heat will make the flesh tender and easy to shred into those beautiful noodle-like strands we love.
Step 3: Sauté Onions and Garlic
While the squash is roasting, heat a skillet over medium heat. Sauté onions in a bit of olive oil until they’re softened—about five minutes should do. Add minced garlic and cook for an additional minute. This step enhances their sweetness and brings out fantastic flavors you’ll mix into the gratin.
Step 4: Shred the Squash
Once your squash is cool enough to handle, use a fork to shred it into noodle-like strands. This is where the fun begins! The texture adds so much character to our dish.
Step 5: Combine Ingredients
In a large bowl, mix together your shredded squash with sautéed onions and garlic, Greek yogurt, one cup of cheese, salt, pepper, and optional paprika or thyme. This mixture is where all those comforting flavors blend together beautifully.
Step 6: Bake Your Dish
Transfer your mixture into a greased casserole dish and sprinkle with the remaining half cup of cheese on top. Bake at 375°F for 20–25 minutes until it’s hot and bubbly with that gorgeous golden top.
Step 7: Serve and Enjoy!
Let your Healthy Spaghetti Squash Au Gratin cool slightly before serving. It’s perfect as a side dish or can even stand alone as a light main course. Enjoy every cheesy bite!
Now you’re ready to impress your friends and family with this deliciously healthy creation! Happy cooking!
Pro Tips for Making Healthy Spaghetti Squash Au Gratin
Making this dish is a breeze, but a few helpful tips can elevate your cooking experience and the final result!
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Choose a ripe spaghetti squash: A firm, heavy squash will yield the best texture and flavor. Look for one with a uniform color and no soft spots.
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Don’t skip the roasting: Roasting the spaghetti squash enhances its natural sweetness and gives it a wonderful, tender texture. It also makes shredding much easier!
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Opt for fresh herbs: If you have them on hand, using fresh herbs instead of dried can add an extra layer of flavor that really brightens the dish. Fresh thyme or parsley works wonderfully.
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Make it ahead of time: You can prepare the casserole in advance and keep it in the fridge until you’re ready to bake. This is perfect for busy weeknights or holiday gatherings!
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Experiment with cheese: While sharp cheddar is delicious, feel free to mix in other cheeses like mozzarella or gouda for a different flavor profile. Just adjust based on your taste preferences!
How to Serve Healthy Spaghetti Squash Au Gratin
This Healthy Spaghetti Squash Au Gratin is not only comforting but also versatile. Here are some ideas on how to present this delightful dish to impress your family or guests.
Garnishes
- Chopped fresh parsley: Sprinkling some vibrant green parsley adds a pop of color and freshness.
- Red pepper flakes: For those who enjoy a little heat, a dash of red pepper flakes will give your au gratin an exciting kick.
Side Dishes
- Steamed broccoli: Lightly steamed broccoli brings a crunchy contrast and complements the creamy texture of the gratin.
- Mixed green salad: A simple salad with mixed greens, cherry tomatoes, and a lemon vinaigrette adds brightness and balances the richness of the dish.
- Roasted carrots: Sweet roasted carrots provide an earthy flavor that pairs beautifully with the cheesy spaghetti squash.
- Quinoa pilaf: A light quinoa pilaf with herbs offers a nutritious complement while adding an interesting texture to your meal.
Enjoy crafting this lovely dish that’s sure to become a favorite at your table!

Make Ahead and Storage
This Healthy Spaghetti Squash Au Gratin is not only delicious but also perfect for meal prep! You can easily make it ahead of time and enjoy it throughout the week.
Storing Leftovers
- Place any leftover au gratin in an airtight container.
- Store in the refrigerator for up to 3 days.
- Reheat individual portions in the microwave or cover and warm in the oven.
Freezing
- Allow the dish to cool completely before freezing.
- Transfer to a freezer-safe container, leaving some space at the top for expansion.
- Freeze for up to 2 months. For best quality, label with the date.
Reheating
- Thaw overnight in the refrigerator before reheating.
- To reheat, preheat your oven to 350°F (175°C).
- Cover with foil and bake for about 20 minutes or until heated through.
FAQs
Here are some common questions about this recipe that might help clarify things!
Can I make Healthy Spaghetti Squash Au Gratin without cheese?
Absolutely! You can omit the cheese or use a dairy-free cheese alternative if you prefer. The dish will still be creamy and delicious thanks to the Greek yogurt.
How do I know when my spaghetti squash is cooked?
Your spaghetti squash is ready when it is tender and easy to shred with a fork. After roasting, let it cool slightly before scraping out those noodle-like strands!
Is Healthy Spaghetti Squash Au Gratin suitable for meal prep?
Yes! This dish stores well in the fridge and can be frozen, making it a great option for meal prep. Just follow the storage instructions above!
What can I serve with Healthy Spaghetti Squash Au Gratin?
It pairs wonderfully with a fresh salad or roasted vegetables. You could also enjoy it as a lighter main dish alongside grilled chicken or fish!
Final Thoughts
This Healthy Spaghetti Squash Au Gratin is truly a special dish that brings warmth and comfort to any table. It’s not only satisfying but also packed with wholesome ingredients that make you feel good about what you’re eating. I hope you enjoy making this delightful recipe as much as I do! Don’t hesitate to share your thoughts and experiences—I love hearing from fellow food lovers! Happy cooking!
Healthy Spaghetti Squash Au Gratin
Enjoy this Healthy Spaghetti Squash Au Gratin, a creamy and cheesy delight perfect for meal prep. Try it today for a comforting dish!
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Total Time: 55 minutes
- Yield: Serves approximately six
- Category: Main Course
- 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).
- Cut the spaghetti squash in half lengthwise and scoop out the seeds. Brush with olive oil and place cut-side down on a baking sheet. Roast for about 40 minutes until tender.
- Sauté diced onions in olive oil over medium heat for about five minutes, then add garlic and cook for an additional minute.
- Once the squash is cool enough to handle, shred it into noodle-like strands.
- In a large bowl, combine shredded squash, sautéed onions and garlic, Greek yogurt, one cup of cheese, salt, pepper, and optional spices.
- Transfer the mixture to a greased casserole dish and top with remaining cheese. Bake at 375°F (190°C) for 20–25 minutes until hot and bubbly.
- Let cool slightly before serving.
Nutrition
- Serving Size: 1 serving
- Calories: 210
- Sugar: 2g
- Sodium: 310mg
- Fat: 10g
- Saturated Fat: 4g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 18g
- Fiber: 3g
- Protein: 12g
- Cholesterol: 25mg
