This Healthy Spaghetti Squash Au Gratin is a delightful and cozy dish that combines comfort with clean eating. It’s rich in flavor yet low in carbs, making it perfect for various occasions, from casual weeknight dinners to festive holiday gatherings. With roasted spaghetti squash mixed with sautéed onions, creamy Greek yogurt, and sharp cheddar, this dish is both satisfying and healthy.
Why You’ll Love This Recipe
- Easy to Prepare: This dish comes together quickly and requires minimal cooking skills—perfect for beginners.
- Flavorful and Satisfying: Combining cheese and spices, it delivers a comforting taste without being heavy.
- Versatile Use: Serve it as a side dish or a light main course; it fits any meal plan.
- Nutritious Ingredients: Packed with veggies and protein from Greek yogurt, it’s guilt-free indulgence.
- Gluten-Free Option: Naturally gluten-free, making it suitable for a variety of dietary preferences.
Tools and Preparation
To make your cooking experience smooth and enjoyable, having the right tools is essential. Here are some key items you’ll need.
Essential Tools and Equipment
- Baking sheet
- Mixing bowl
- Skillet
- Casserole dish
- Fork
Importance of Each Tool
- Baking sheet: Provides even roasting for the spaghetti squash, ensuring tender results.
- Mixing bowl: Necessary for combining ingredients thoroughly without mess.
- Skillet: Ideal for sautéing onions and garlic to bring out their flavors before mixing them into the dish.

Ingredients
For the Spaghetti Squash
- 1 medium spaghetti squash
- 1 tbsp olive oil
For the Filling
- 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
How to Make Healthy Spaghetti Squash Au Gratin
Step 1: Preheat the Oven
Preheat your oven to 400°F (205°C). This ensures that your spaghetti squash will roast evenly.
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.
- Place the squash face-down on a baking sheet.
- Roast for 35–40 minutes or until tender.
Step 3: Sauté Onions and Garlic
- Heat a skillet over medium heat.
- Add a bit of olive oil and sauté the diced onions until softened, about 5 minutes.
- Stir in minced garlic and cook for an additional minute before removing from heat.
Step 4: Shred the Squash
Once the roasted squash has cooled enough to handle, use a fork to shred it into noodle-like strands.
Step 5: Combine Ingredients
In a large mixing bowl, combine the shredded squash with sautéed onions and garlic, Greek yogurt, 1 cup of shredded cheese, salt, pepper, and optional spices.
Step 6: Prepare for Baking
Transfer the mixture into a greased casserole dish. Top with the remaining ½ cup of cheese.
Step 7: Bake Until Bubbly
Bake at 375°F for about 20–25 minutes until hot and bubbly with a golden top.
Step 8: Serve and Enjoy!
Let your Healthy Spaghetti Squash Au Gratin cool slightly before serving. Enjoy as either a side dish or light main course!
How to Serve Healthy Spaghetti Squash Au Gratin
Serving Healthy Spaghetti Squash Au Gratin is a chance to get creative and elevate your meal. This dish pairs wonderfully with various accompaniments, making it versatile enough for any occasion. Here are some delightful serving suggestions.
As a Main Dish
- Enjoy this Healthy Spaghetti Squash Au Gratin on its own for a light yet satisfying meal. The creamy texture and cheesy flavor make it filling enough as the star of your plate.
Paired with Grilled Chicken
- Serve alongside grilled chicken breasts seasoned with herbs for a protein-packed meal. The flavors complement each other beautifully.
With a Fresh Salad
- A crisp green salad adds freshness and crunch to your meal. Toss together mixed greens, cherry tomatoes, and a light vinaigrette for balance.
As a Side for Roasted Vegetables
- Pair with an assortment of roasted vegetables like bell peppers, zucchini, and carrots. Their natural sweetness contrasts nicely with the savory gratin.
Accompanied by Garlic Bread
- Serve with warm garlic bread for a comforting touch. The buttery, garlicky bread perfectly complements the cheesy flavor of the gratin.
Topped with Fresh Herbs
- Garnish each serving with fresh herbs like parsley or basil for added color and flavor. This enhances presentation while adding a touch of freshness.
How to Perfect Healthy Spaghetti Squash Au Gratin
To ensure your Healthy Spaghetti Squash Au Gratin turns out perfectly every time, consider these helpful tips.
- Choose a ripe spaghetti squash: Look for one that feels heavy for its size and has a uniform yellow color. A ripe squash will yield better flavor.
- Roast until tender: Make sure to roast the squash until it is fork-tender. This step is crucial for achieving that perfect noodle-like texture.
- Use quality cheese: Opt for sharp cheddar cheese to give the dish a rich, bold flavor that stands out in every bite.
- Adjust seasoning: Taste the mixture before baking and adjust salt and pepper as needed to suit your palate.
- Let it cool slightly: Allow the gratin to cool before serving; this helps set the layers and makes serving easier.
- Experiment with toppings: Try adding breadcrumbs or nutritional yeast on top before baking for an extra crunchy finish.
Best Side Dishes for Healthy Spaghetti Squash Au Gratin
Pairing side dishes with your Healthy Spaghetti Squash Au Gratin can enhance your dining experience. Here’s a list of perfect accompaniments that work well together.
- Steamed Broccoli: Bright green broccoli adds nutrition and color, balancing the richness of the gratin.
- Quinoa Salad: A refreshing quinoa salad brings texture and nutty flavors that compliment cheesy dishes.
- Roasted Brussels Sprouts: These crispy sprouts offer a delicious contrast with their slight bitterness against the creamy gratin.
- Sautéed Green Beans: Crisp-tender green beans sautéed in olive oil add crunch while being simple to prepare.
- Cauliflower Rice: Light and fluffy cauliflower rice serves as a great low-carb option that absorbs flavors well.
- Sweet Potato Wedges: Roasted sweet potato wedges provide natural sweetness that pairs beautifully with savory dishes like au gratin.
- Caprese Skewers: Cherry tomatoes, mozzarella balls, and basil drizzled with balsamic glaze offer brightness and freshness on the side.
- Cucumber Salad: A light cucumber salad dressed in vinegar adds refreshing contrast to rich flavors of the dish.
Common Mistakes to Avoid
When making Healthy Spaghetti Squash Au Gratin, it’s easy to overlook some key steps. Here are common mistakes and tips to help you succeed.
- Skipping the roasting step: Roasting spaghetti squash enhances its flavor and texture. Always roast until tender for the best results.
- Not properly shredding the squash: Ensure you shred the squash into noodle-like strands. This allows for even distribution of flavors and a better eating experience.
- Overcooking the onions: Sauté onions until softened, but avoid browning them too much. This keeps their flavor subtle and complements the dish.
- Using low-quality cheese: Opt for good-quality sharp cheddar for maximum flavor. Cheaper cheeses may not melt well or taste as good.
- Neglecting seasoning: Don’t skip adding salt and pepper. Proper seasoning elevates the dish and brings out all the delicious flavors.
Storage & Reheating Instructions
Refrigerator Storage
- Store in an airtight container for up to 3 days.
- Allow the dish to cool completely before sealing to prevent condensation.
Freezing Healthy Spaghetti Squash Au Gratin
- Freeze in a freezer-safe container for up to 2 months.
- Consider portioning for easier thawing and reheating later.
Reheating Healthy Spaghetti Squash Au Gratin
- Oven: Preheat oven to 350°F (175°C) and bake covered for about 15–20 minutes until heated through.
- Microwave: Use a microwave-safe dish, cover loosely, and heat in intervals of 1–2 minutes until warm.
- Stovetop: Heat gently in a skillet over medium-low heat, stirring occasionally to prevent sticking.
Frequently Asked Questions
Here are some common questions about Healthy Spaghetti Squash Au Gratin that will help clarify any doubts.
Can I make Healthy Spaghetti Squash Au Gratin ahead of time?
Yes, you can prepare it a day in advance. Just store it in the refrigerator before baking.
What can I serve with Healthy Spaghetti Squash Au Gratin?
It pairs well with grilled chicken or a fresh green salad for a balanced meal.
How do I know when my spaghetti squash is done roasting?
The squash is ready when it’s tender enough to shred easily with a fork.
Can I customize the cheese in Healthy Spaghetti Squash Au Gratin?
Absolutely! Feel free to experiment with different cheeses like Monterey Jack or Gouda for varied flavors.
Final Thoughts
This Healthy Spaghetti Squash Au Gratin is perfect for those seeking comfort food without guilt. Its creamy texture and cheesy goodness make it versatile as both a side dish or light main course. You can also customize it by adding your favorite vegetables or spices—get creative!
Healthy Spaghetti Squash Au Gratin
Indulge in a guilt-free delight with this Healthy Spaghetti Squash Au Gratin. This dish perfectly marries comfort food and wholesome ingredients, making it a fantastic choice for any occasion, from casual dinners to festive gatherings. With roasted spaghetti squash as the base, it’s enriched with sautéed onions, creamy Greek yogurt, and sharp cheddar cheese, offering a rich flavor without the heaviness of traditional gratins. Low in carbs and naturally gluten-free, this versatile recipe can be a satisfying side or a light main dish that everyone will love.
- Prep Time: 15 minutes
- Cook Time: 1 hour
- Total Time: 1 hour 15 minutes
- Yield: Serves 6
- Category: Main
- 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 oven to 400°F (205°C).
- Halve the spaghetti squash and scoop out seeds. Brush cut sides with olive oil and place face-down on a baking sheet. Roast for 35–40 minutes until tender.
- Sauté onions in olive oil until softened; add minced garlic for another minute.
- Shred roasted squash into noodle-like strands.
- In a bowl, mix shredded squash with onions, garlic, Greek yogurt, 1 cup cheese, salt, pepper, and optional spices.
- Transfer to a greased casserole dish; top with remaining cheese.
- Bake at 375°F for 20–25 minutes until bubbly and golden.
- Let cool slightly before serving.
Nutrition
- Serving Size: 1 cup (200g)
- Calories: 210
- Sugar: 3g
- Sodium: 350mg
- Fat: 10g
- Saturated Fat: 5g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 20g
- Fiber: 4g
- Protein: 11g
- Cholesterol: 25mg