Healthy Spaghetti Squash Au Gratin
This Healthy Spaghetti Squash Au Gratin is a delightful dish that perfectly combines comfort food and healthy eating. Whether you’re hosting a dinner party or looking for a wholesome weeknight meal, this recipe fits the bill. It’s rich in flavor while being low in carbs and gluten-free, making it a standout choice for everyone at the table. The creamy texture from Greek yogurt and the sharpness of cheddar create a delicious blend that will warm your heart and satisfy your taste buds.
Why You’ll Love This Recipe
- Healthier Alternative: Enjoy the classic gratin experience without the guilt. This dish is low-carb and gluten-free.
- Easy to Prepare: With simple steps, you can whip up this dish quickly, making it perfect for any weeknight dinner.
- Flavorful and Cheesy: The combination of sharp cheddar and creamy Greek yogurt creates an irresistible flavor profile that everyone will love.
- Versatile Dish: Serve it as a side or a light main course—this recipe adapts to any meal occasion.
- Vegetable-Packed Goodness: Incorporate more veggies into your diet without sacrificing taste; spaghetti squash is nutritious and filling.

Tools and Preparation
To create this Healthy Spaghetti Squash Au Gratin, you’ll need some essential kitchen tools. Having the right equipment will make your cooking experience smoother and more enjoyable.
Essential Tools and Equipment
- Baking sheet
- Casserole dish
- Skillet
- Fork
- Knife
Importance of Each Tool
- Baking sheet: Ideal for roasting the spaghetti squash evenly for optimal tenderness.
- Casserole dish: Perfect for mixing and baking all ingredients together, ensuring even cooking.
- Skillet: Essential for sautéing onions and garlic, enhancing their flavors before adding them to the squash.
- Fork: Handy for shredding the spaghetti squash into noodle-like strands, creating the perfect texture.
Ingredients
For the Spaghetti Squash Au Gratin
- 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
How to Make Healthy Spaghetti Squash Au Gratin
Step 1: Preheat the Oven
Preheat your oven to 400°F (205°C). Slice the spaghetti squash in half lengthwise and scoop out all seeds.
Step 2: Roast the Spaghetti Squash
Brush the cut sides of the squash with olive oil. Place them face-down on a baking sheet. Roast in the preheated oven for 35–40 minutes until tender.
Step 3: Sauté Onions and Garlic
While the squash roasts, heat a skillet over medium heat. Add diced onions with a bit of olive oil. Sauté until softened (about 5 minutes). Add minced garlic and cook for an additional minute before removing from heat.
Step 4: Shred the Squash
Once cool enough to handle, use a fork to shred the roasted spaghetti squash into noodle-like strands.
Step 5: Combine Ingredients
In a large bowl, mix shredded squash with sautéed onions and garlic, Greek yogurt, 1 cup of shredded cheese, salt, pepper, and optional paprika or thyme.
Step 6: Transfer to Casserole Dish
Transfer this mixture to a greased casserole dish. Top it off with the remaining ½ cup of shredded cheese.
Step 7: Bake Until Bubbly
Bake at 375°F for 20–25 minutes or until hot throughout and bubbly with a golden top.
Step 8: Serve and Enjoy!
Let cool slightly before serving. This Healthy Spaghetti Squash Au Gratin can be enjoyed as either a side dish or a light main course!
How to Serve Healthy Spaghetti Squash Au Gratin
This Healthy Spaghetti Squash Au Gratin is versatile and can be served in various ways. Whether as a main dish or a delightful side, there are plenty of options to enhance your dining experience.
As a Side Dish
- With Roasted Vegetables: Pair with seasonal roasted veggies like Brussels sprouts or carrots for added color and nutrition.
- Alongside Grilled Proteins: This dish complements grilled chicken, steak, or fish beautifully, making it a balanced meal.
- With a Fresh Salad: Serve with a light garden salad to add freshness and crunch to your plate.
As a Main Course
- Topped with Protein: Add shredded chicken or turkey on top for a heartier meal that is still healthy.
- In a Wrap: Use the au gratin mixture in whole-grain tortillas for a delicious and filling wrap.
- Accompanied by Bread: Serve with whole-grain bread or gluten-free rolls for dipping.
How to Perfect Healthy Spaghetti Squash Au Gratin
Perfecting your Healthy Spaghetti Squash Au Gratin can elevate this dish even further. Here are some tips to ensure it turns out wonderfully every time.
- Choose the Right Squash: Select a firm, medium-sized spaghetti squash for the best texture and flavor.
- Adjust Seasoning: Don’t hesitate to taste and adjust the seasoning while mixing. A pinch more salt or pepper can make a big difference.
- Use Fresh Ingredients: Fresh garlic and onions will provide more flavor than dried alternatives, enhancing the overall taste.
- Customize Cheese Choices: Experiment with different cheese blends, such as mozzarella or pepper jack, for unique flavors while keeping it healthy.
- Don’t Rush Baking: Allow it to bake until it’s golden and bubbly—this adds depth of flavor and improves texture.
- Let It Rest Before Serving: Allow the dish to cool slightly before serving. This helps the layers set nicely.
Best Side Dishes for Healthy Spaghetti Squash Au Gratin
Complement your Healthy Spaghetti Squash Au Gratin with these delightful side dishes. They enhance your meal while keeping it nutritious.
- Garlic Green Beans: Crisp-tender green beans sautéed in garlic oil add vibrant color and flavor.
- Cauliflower Rice Pilaf: Light and fluffy cauliflower rice mixed with herbs provides a low-carb alternative to traditional rice.
- Zucchini Noodles: These spiralized noodles drizzled with olive oil bring freshness and an additional veggie boost.
- Quinoa Salad: A protein-packed quinoa salad with cherry tomatoes and cucumbers offers great texture contrast.
- Honey-Glazed Carrots: Sweet, roasted carrots glazed with honey create a perfect balance of flavors with the au gratin.
- Mushroom Risotto: Creamy risotto made with mushrooms adds richness that pairs perfectly with the cheesy spaghetti squash.
Common Mistakes to Avoid
To get the most out of your Healthy Spaghetti Squash Au Gratin, avoid these common pitfalls.
- Ignoring squash ripeness: Ensure your spaghetti squash is ripe. A dull rind and a firm feel indicate it’s ready. An under ripe squash can result in an undesirable texture.
- Overcooking the squash: If you roast the squash for too long, it can become mushy. Aim for 35-40 minutes at 400°F for perfectly tender strands.
- Skipping seasoning: Don’t forget to season your dish adequately. Salt and pepper enhance flavors significantly, so be generous but balanced.
- Neglecting to let it cool: Letting the dish cool slightly before serving helps it set and makes serving easier. Cutting into it too soon can lead to a watery mess.
- Using low-quality cheese: For the best flavor in your gratin, opt for high-quality sharp cheddar. It melts better and enhances the overall taste of your dish.

Storage & Reheating Instructions
Refrigerator Storage
- Store in an airtight container for up to 3-4 days.
- Allow the dish to cool completely before sealing to prevent moisture buildup.
Freezing Healthy Spaghetti Squash Au Gratin
- Freeze in a freezer-safe container or wrap tightly with plastic wrap and then foil.
- It can last up to 2-3 months in the freezer, but note that texture may change slightly upon reheating.
Reheating Healthy Spaghetti Squash Au Gratin
- Oven: Preheat to 350°F (175°C) and bake for about 20 minutes until heated through.
- Microwave: Heat in short intervals (1-2 minutes), stirring occasionally, until hot.
- Stovetop: Place in a skillet over medium heat, stirring frequently until warmed through.
Frequently Asked Questions
Here are some common questions about making Healthy Spaghetti Squash Au Gratin.
What is Healthy Spaghetti Squash Au Gratin?
Healthy Spaghetti Squash Au Gratin is a low-carb, gluten-free dish that combines roasted spaghetti squash with creamy yogurt and cheese, baked until bubbly.
Can I replace Greek yogurt?
Yes, you can substitute sour cream or even cottage cheese if you prefer. Each option will give a slightly different taste but will still be delicious.
How do I know when the squash is done roasting?
When the spaghetti squash is fork-tender and easily shredded into strands, it’s done. This usually takes about 35-40 minutes at 400°F.
Can I customize this recipe?
Absolutely! Feel free to add vegetables like spinach or mushrooms or swap out cheeses for what you have on hand. It’s versatile!
Final Thoughts
This Healthy Spaghetti Squash Au Gratin is not only comforting but also a healthier alternative to traditional gratins. Its cheesy goodness paired with fresh ingredients makes it perfect as a main course or side dish. Don’t hesitate to customize it with your favorite veggies or herbs!
Healthy Spaghetti Squash Au Gratin
Indulge in the creamy, cheesy goodness of Healthy Spaghetti Squash Au Gratin, a delightful fusion of comfort food and nutritious eating. This low-carb and gluten-free dish is perfect for any occasion, from cozy weeknight dinners to elegant dinner parties. The roasted spaghetti squash is combined with the richness of Greek yogurt and sharp cheddar cheese, delivering a warm, satisfying flavor that everyone will love. It’s not just delicious; it’s packed with vegetables, making it a fantastic way to sneak in healthy ingredients without compromising on taste. Whether served as a side or a light main course, this dish promises to be a hit at your table.
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Total Time: 55 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
Instructions
- Preheat the oven to 400°F (205°C). Halve the spaghetti squash and scoop out the seeds.
- Brush cut sides with olive oil and roast face-down on a baking sheet for 35–40 minutes until tender.
- Sauté onions in a skillet until softened, then add garlic for another minute.
- Once cooled, shred the squash into strands using a fork.
- Mix shredded squash with sautéed onions and garlic, Greek yogurt, 1 cup cheese, salt, and pepper.
- Pour into a greased casserole dish and top with remaining cheese.
- Bake at 375°F for 20–25 minutes until bubbly and golden.
Nutrition
- Serving Size: 1 serving
- Calories: 180
- Sugar: 3g
- Sodium: 290mg
- Fat: 9g
- Saturated Fat: 4g
- Unsaturated Fat: 5g
- Trans Fat: 0g
- Carbohydrates: 14g
- Fiber: 3g
- Protein: 10g
- Cholesterol: 25mg