Healthy Spaghetti Squash Au Gratin
This Healthy Spaghetti Squash Au Gratin is a delightful dish that combines comfort and health in every bite. With its creamy texture and cheesy flavor, this recipe is perfect for weeknight dinners, holiday gatherings, or as a side dish to impress your guests. It’s naturally low-carb, gluten-free, and packed with vegetables, making it a wholesome choice for any meal. You will love how simple it is to prepare while delivering rich flavors that everyone will enjoy!
Why You’ll Love This Recipe
- Comforting Flavor – The combination of roasted spaghetti squash with sharp cheddar creates a warm and inviting dish.
- Easy Preparation – With straightforward instructions, you can whip this up without fuss.
- Versatile Dish – Serve it as a side or enjoy it as a light main course; it fits any occasion!
- Healthy Ingredients – Packed with nutrients from vegetables and Greek yogurt, this dish offers better health benefits.
- Gluten-Free Goodness – Perfect for those avoiding gluten while still enjoying hearty meals.

Tools and Preparation
Creating this delicious Healthy Spaghetti Squash Au Gratin requires some essential tools. Having the right equipment makes the cooking process smoother and more enjoyable.
Essential Tools and Equipment
- Baking sheet
- Skillet
- Casserole dish
- Fork
- Knife
Importance of Each Tool
- Baking sheet – This tool allows you to roast the spaghetti squash evenly for perfect tenderness.
- Skillet – Ideal for sautéing onions and garlic to enhance their flavors before mixing them into the gratin.
- Casserole dish – A must-have for baking the final mixture, ensuring an even cook and beautiful presentation.
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 the seeds.
Step 2: Roast the Squash
Brush the cut sides of the squash with olive oil. Place them face-down on a baking sheet. Roast for about 35–40 minutes or until tender.
Step 3: Sauté Onions and Garlic
While the squash roasts, heat a skillet over medium heat.
Sauté the diced onions in a bit of olive oil until they are softened (about 5 minutes).
Add minced garlic and cook for an additional minute. Remove from heat when done.
Step 4: Prepare the Squash Noodles
Once the roasted squash is cool enough to handle, use a fork to shred it into noodle-like strands.
Step 5: Combine Ingredients
In a large bowl, mix together:
Shredded squash
Sautéed onions and garlic
Greek yogurt
1 cup of shredded cheese
Salt
Black pepper
Optional paprika or thyme
Step 6: Transfer to Casserole Dish
Transfer this mixture into a greased casserole dish. Top with the remaining ½ cup of cheese.
Step 7: Bake Until Golden
Bake at 375°F (190°C) for about 20–25 minutes until hot and bubbly with a golden top.
Step 8: Serve and Enjoy!
Let cool slightly before serving. Enjoy your Healthy Spaghetti Squash Au Gratin as a delightful side dish or light main!
How to Serve Healthy Spaghetti Squash Au Gratin
Serving Healthy Spaghetti Squash Au Gratin can elevate any meal, whether you’re enjoying it as a main course or a side dish. Here are some delightful ways to present this cheesy, veggie-packed dish.
As a Main Course
- Pair with a fresh salad to balance the richness of the gratin.
- Serve alongside grilled chicken or fish for a protein boost.
As a Side Dish
- Complement roasted meats like turkey or pork for a hearty holiday meal.
- Offer it with vegetarian dishes, enhancing the overall flavor with its creaminess.
With Toppings
- Add chopped fresh herbs like parsley or chives for a pop of freshness.
- Sprinkle with extra cheese or breadcrumbs before baking for added texture.
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 squash: Look for firm spaghetti squash with a uniform yellow color. Avoid any that have blemishes or soft spots.
- Roast until tender: Ensure the squash is cooked through before shredding; it should easily pull apart into strands.
- Don’t skimp on seasoning: Adjust salt and pepper according to your taste to enhance the dish’s flavors.
- Use quality cheese: Opt for sharp cheddar cheese for maximum flavor; you can experiment with other varieties if desired.
- Let it cool slightly: Allowing the dish to set for a few minutes after baking makes it easier to serve and enhances the flavors.
- Experiment with spices: Try adding nutmeg or Italian seasoning for an extra layer of flavor.
Best Side Dishes for Healthy Spaghetti Squash Au Gratin
Pairing side dishes with your Healthy Spaghetti Squash Au Gratin can create a well-rounded meal. Here are some great options to consider.
- Garlic Green Beans: Sautéed green beans tossed in garlic and olive oil make a crunchy, flavorful companion.
- Mixed Greens Salad: A light salad with vinaigrette offers freshness and balances the richness of the gratin.
- Roasted Brussels Sprouts: Seasoned Brussels sprouts add a savory touch that complements the dish beautifully.
- Quinoa Pilaf: A nutty quinoa pilaf provides additional texture and nutrients, making it satisfying and healthy.
- Stuffed Bell Peppers: These colorful peppers filled with rice and veggies can be stuffed ahead of time for quick prep at dinner.
- Herbed Couscous: Light and fluffy couscous seasoned with herbs pairs well and absorbs flavors from the gratin nicely.
Common Mistakes to Avoid
When making Healthy Spaghetti Squash Au Gratin, it’s easy to overlook some key steps. Here are common mistakes to avoid for the best results.
- Using unripe spaghetti squash: Selecting a squash that is not ripe can lead to a watery texture. Always choose a firm and heavy squash with a smooth skin.
- Skipping the roasting step: Not roasting the spaghetti squash properly can result in undercooked strands. Roast until tender and easily shredded for the best consistency.
- Overcooking the onions: Cooking onions too long may cause them to become bitter. Sauté until softened, about 5 minutes, just before adding garlic.
- Ignoring seasoning: Neglecting to season with salt and pepper can lead to bland flavors. Taste your mixture before baking and adjust as needed for a flavorful dish.
- Not letting it cool before serving: Serving immediately can result in a messy presentation. Let it cool slightly for better serving and flavor development.

Storage & Reheating Instructions
Refrigerator Storage
- Store in an airtight container for up to 3–4 days.
- Ensure it has cooled completely before sealing to prevent moisture buildup.
Freezing Healthy Spaghetti Squash Au Gratin
- Freeze in a freezer-safe container or bag for up to 2–3 months.
- Label containers with date and contents for easy identification later.
Reheating Healthy Spaghetti Squash Au Gratin
- Oven: Preheat to 350°F (175°C) and bake covered until heated through, about 20-25 minutes.
- Microwave: Heat in microwave-safe bowl, covered, for 2–3 minutes or until hot, stirring halfway.
- Stovetop: Warm over medium heat in a skillet, stirring occasionally until heated thoroughly.
Frequently Asked Questions
What is Healthy Spaghetti Squash Au Gratin?
Healthy Spaghetti Squash Au Gratin is a low-carb, gluten-free dish that features roasted spaghetti squash mixed with creamy ingredients and topped with cheese.
Can I use other cheeses?
Yes! Feel free to swap out sharp cheddar for mozzarella or gouda for different flavors while keeping the dish healthy.
How do I make this recipe vegan?
To make Healthy Spaghetti Squash Au Gratin vegan, substitute Greek yogurt with dairy-free yogurt and replace cheddar cheese with vegan cheese alternatives.
Can I prepare this dish ahead of time?
Absolutely! You can prepare the mix beforehand and store it in the refrigerator until you’re ready to bake it.
Final Thoughts
This Healthy Spaghetti Squash Au Gratin is not only delicious but also offers versatility as both a side dish or light main course. With its cheesy goodness and healthy ingredients, you can customize it by adding your favorite herbs or vegetables. Try this recipe today, and enjoy a warm, comforting meal any day of the week!
Healthy Spaghetti Squash Au Gratin
Healthy Spaghetti Squash Au Gratin is a comforting and nutritious dish that seamlessly blends rich flavors with wholesome ingredients. This delightful recipe features perfectly roasted spaghetti squash tossed with sautéed onions and garlic, creamy Greek yogurt, and a generous helping of sharp cheddar cheese. Whether served as a light main course or an impressive side dish, this low-carb, gluten-free casserole is sure to please everyone at the table. With its creamy texture and cheesy goodness, it’s perfect for family dinners, holiday gatherings, or any occasion where you want to impress your guests. Simple to prepare and bursting with flavor, this Healthy Spaghetti Squash Au Gratin will become a favorite in your cooking repertoire!
- Prep Time: 15 minutes
- Cook Time: 60 minutes
- Total Time: 1 hour 15 minutes
- Yield: Serves 4
- 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 (or sour cream)
- 1½ cups shredded sharp cheddar cheese (divided)
- Salt and black pepper
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 diced onions in a skillet over medium heat for about 5 minutes, then add minced garlic for an additional minute.
- Once the squash cools, shred it into noodle-like strands using a fork.
- In a large bowl, combine shredded squash, sautéed onions and garlic, Greek yogurt, 1 cup of cheese, salt, and pepper.
- Transfer mixture to a greased casserole dish and top with remaining cheese.
- Bake at 375°F (190°C) for 20–25 minutes until hot and golden.
Nutrition
- Serving Size: 1 cup (210g)
- Calories: 250
- Sugar: 3g
- Sodium: 330mg
- Fat: 14g
- Saturated Fat: 7g
- Unsaturated Fat: 6g
- Trans Fat: 0g
- Carbohydrates: 18g
- Fiber: 3g
- Protein: 12g
- Cholesterol: 35mg