Healthy Spaghetti Squash Au Gratin
This Healthy Spaghetti Squash Au Gratin is a delightful blend of comfort and clean eating. Perfect for any occasion, from casual dinners to festive gatherings, this dish brings together the wholesome goodness of roasted spaghetti squash with rich flavors of cheese and creamy yogurt. It’s a low-carb, gluten-free option that doesn’t skimp on taste, making it a favorite for both everyday meals and special celebrations.
Why You’ll Love This Recipe
- Easy to Prepare: With simple ingredients and straightforward steps, this recipe is quick to make.
- Flavorful Comfort: The combination of garlic, onions, and sharp cheddar delivers satisfying flavors.
- Versatile Dish: Enjoy it as a side or a light main dish; it suits various meal plans.
- Healthy Ingredient Swap: Greek yogurt replaces heavy cream for a lighter take without sacrificing creaminess.
- Low-Carb Delight: A great choice for those looking to reduce carbs while still enjoying hearty dishes.

Tools and Preparation
This recipe requires minimal kitchen tools, making preparation simple and enjoyable. Gather your essentials before you start cooking.
Essential Tools and Equipment
- Baking sheet
- Skillet
- Casserole dish
- Fork
- Knife
Importance of Each Tool
- Baking sheet: Ideal for roasting the spaghetti squash evenly, ensuring it becomes tender.
- Skillet: Perfect for sautéing onions and garlic, enhancing their flavors before mixing them into the dish.
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 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
While the squash roasts, heat a skillet over medium heat. Sauté the diced onions in a bit of olive oil until softened, about 5 minutes. Add minced garlic and cook for an additional minute. Remove from heat.
Step 4: Shred the Squash
Once the squash is cool enough to handle, use a fork to shred it into noodle-like strands.
Step 5: Mix Ingredients
In a large bowl, combine 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 the mixture into a greased casserole dish. Top with the remaining ½ cup of shredded cheese.
Step 7: Bake
Bake at 375°F for 20–25 minutes until hot and bubbly with a golden top.
Step 8: Serve
Let cool slightly before serving. Enjoy this Healthy Spaghetti Squash Au Gratin as a delicious side dish or light main!
How to Serve Healthy Spaghetti Squash Au Gratin
This Healthy Spaghetti Squash Au Gratin is versatile and can be enjoyed in many ways. Whether you want it as a side dish or a light main course, there are plenty of serving suggestions to suit your taste.
As a Side Dish
- Pair with Grilled Meats: This dish complements grilled chicken or steak beautifully, adding a creamy texture to balance the meal.
- Serve with Roasted Vegetables: The cheesy goodness of the gratin contrasts well with the earthy flavors of roasted veggies like Brussels sprouts or carrots.
As a Main Course
- Top with Protein: Add cooked chicken, shrimp, or tofu on top for a satisfying and nutritious meal.
- Garnish with Fresh Herbs: Sprinkle chopped parsley or basil to enhance the flavor and add a touch of freshness.
For Meal Prep
- Pack in Lunchboxes: Divide into portions for easy lunches throughout the week; it reheats well and remains delicious.
- Freeze for Later: Store leftovers in an airtight container for up to three months—just reheat when you’re ready to enjoy!
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.
- Use Fresh Ingredients: Start with fresh spaghetti squash and high-quality cheese for the best flavor.
- Don’t Overcook the Squash: Check for tenderness around 35 minutes; overcooked squash can become mushy, affecting texture.
- Mix Thoroughly: Ensure all ingredients are mixed well for even distribution of flavors throughout the dish.
- Experiment with Cheese: Try different types of cheese such as Gruyère or Monterey Jack for unique flavor profiles.
- Adjust Seasonings: Taste your mixture before baking; feel free to adjust salt and pepper according to your preference.
- Let It Rest: Allow the dish to cool slightly after baking; this helps it set and makes serving easier.
Best Side Dishes for Healthy Spaghetti Squash Au Gratin
To create a complete meal, here are some fantastic side dishes that pair wonderfully with Healthy Spaghetti Squash Au Gratin.
- Garlic Bread: A classic choice that adds crunch and flavor; serve warm and toasted alongside.
- Caesar Salad: Crisp Romaine lettuce tossed with Caesar dressing provides a fresh contrast to the richness of the gratin.
- Steamed Broccoli: Simple yet nutritious, steamed broccoli adds color and balances out the meal without overpowering flavors.
- Quinoa Salad: A light quinoa salad mixed with cherry tomatoes and cucumbers offers a refreshing side that’s also filling.
- Roasted Sweet Potatoes: Sweetness from roasted sweet potatoes pairs nicely with the savory gratin while adding extra nutrients.
- Coleslaw: A tangy coleslaw adds crunch and acidity that cuts through the creaminess of the dish perfectly.
Common Mistakes to Avoid
When making Healthy Spaghetti Squash Au Gratin, a few common mistakes can hinder your dish’s success. Here are some to watch out for:
- Skipping the roasting step – Roasting spaghetti squash brings out its natural sweetness and enhances flavor. Don’t rush this step; it’s crucial for the best taste.
- Overcooking or undercooking the squash – If you don’t roast it long enough, the squash will be too firm. Conversely, overcooking can lead to mushiness. Aim for just tender!
- Neglecting seasoning – Seasoning is essential for flavor. Make sure to add salt, pepper, and optional spices to elevate your dish.
- Using low-quality cheese – Cheese quality matters! Opt for sharp cheddar for a richer taste. Avoid pre-shredded cheese as it may contain additives that affect melting.
- Forgetting to let it cool before serving – Allowing the dish to cool slightly helps set the layers and makes serving easier. Don’t serve it straight out of the oven!

Storage & Reheating Instructions
Refrigerator Storage
- Store leftovers in an airtight container.
- It can last up to 3-4 days in the refrigerator.
Freezing Healthy Spaghetti Squash Au Gratin
- Use freezer-safe containers or bags for storage.
- It can be frozen for up to 2-3 months; label with the date.
Reheating Healthy Spaghetti Squash Au Gratin
- Oven – Preheat to 350°F (175°C) and bake for about 15-20 minutes until heated through.
- Microwave – Heat in short bursts, stirring in between until warm.
- Stovetop – Warm on low heat in a skillet, stirring occasionally until hot.
Frequently Asked Questions
Here are some common questions about Healthy Spaghetti Squash Au Gratin:
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 fridge before baking.
What can I substitute for Greek yogurt?
You can use sour cream or cottage cheese as a substitute if you prefer.
How do I know when my spaghetti squash is cooked?
It should be tender and easily shredded into strands with a fork when cooked properly.
Is Healthy Spaghetti Squash Au Gratin gluten-free?
Absolutely! This recipe is naturally gluten-free, making it suitable for those with gluten sensitivities.
Final Thoughts
This Healthy Spaghetti Squash Au Gratin is a delightful blend of comfort and nutrition. Its rich flavors make it a fantastic side dish or a light main course. Feel free to customize with your favorite herbs or cheese types to make it uniquely yours!
Healthy Spaghetti Squash Au Gratin
Healthy Spaghetti Squash Au Gratin is a deliciously comforting dish that combines the wholesome goodness of roasted spaghetti squash with creamy Greek yogurt and sharp cheddar cheese. This low-carb, gluten-free recipe is perfect for any occasion, whether it’s a casual weeknight dinner or a festive gathering. With its rich flavors and satisfying texture, this gratin will become a favorite in your home. Easy to prepare and versatile enough to serve as a side or main dish, you can enjoy it topped with grilled chicken or as part of your meal prep for the week. Dive into this nutritious and cheesy delight that proves healthy eating can be both delicious and satisfying.
- Prep Time: 15 minutes
- Cook Time: 45 minutes
- Total Time: 1 hour
- 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)
- Salt and black pepper
Instructions
- Preheat your oven to 400°F (205°C). Halve the spaghetti squash and scoop out the seeds.
- Brush the cut sides with olive oil and place face-down on a baking sheet. Roast for 35–40 minutes until tender.
- While roasting, sauté onions in olive oil until softened; add minced garlic and cook for another minute.
- Once cool, shred the squash into noodle-like strands with a fork.
- In a bowl, mix shredded squash with sautéed onions, garlic, Greek yogurt, 1 cup of cheese, salt, and pepper.
- Transfer to a greased casserole dish, top with remaining cheese, and bake at 375°F for 20–25 minutes until bubbly.
Nutrition
- Serving Size: 1 cup (240g)
- Calories: 210
- Sugar: 3g
- Sodium: 360mg
- Fat: 10g
- Saturated Fat: 5g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 17g
- Fiber: 4g
- Protein: 12g
- Cholesterol: 30mg