Healthy Spaghetti Squash Au Gratin
This Healthy Spaghetti Squash Au Gratin is a delightful blend of flavors and textures. It’s the perfect dish for any occasion, whether you’re looking for a cozy weeknight meal or an impressive side for your holiday gatherings. With its rich, cheesy goodness and wholesome ingredients, this recipe stands out as a guilt-free comfort food option that everyone will enjoy.
Why You’ll Love This Recipe
- Healthier Comfort Food: Enjoy all the cheesy goodness you crave without the carbs, making it a perfect dish for health-conscious eaters.
- Vegetable-Packed Delight: Incorporating spaghetti squash adds nutrients and fiber to your meal while keeping it light.
- Versatile Dish: Serve it as a hearty side or a main dish; it’s suitable for vegetarians and pairs perfectly with various entrees.
- Easy Preparation: With simple steps and minimal prep time, you can whip up this dish quickly, even on busy nights.
- Crowd-Pleasing Flavor: The combination of sharp cheddar and creamy Greek yogurt creates a rich flavor that will impress family and friends.

Tools and Preparation
To make your Healthy Spaghetti Squash Au Gratin effortlessly, you’ll need some essential tools. Having the right equipment ensures that each step goes smoothly.
Essential Tools and Equipment
- Baking sheet
- Skillet
- Casserole dish
- Fork
- Mixing bowl
Importance of Each Tool
- Baking sheet: Perfect for roasting the spaghetti squash evenly, ensuring it gets tender without burning.
- Skillet: Ideal for sautéing onions and garlic, which enhances their flavors before combining them with the squash.
- Casserole dish: A must-have for baking the final mixture to achieve that golden, bubbly top.
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 in the oven for 35–40 minutes until tender.
Step 3: Sauté Onions and Garlic
While the squash roasts, heat a skillet over medium heat. Sauté the diced onions in olive oil until softened (about 5 minutes). Add minced garlic and cook for an additional minute. Remove from heat once fragrant.
Step 4: Shred the Squash
Once cool enough to handle, use a fork to shred the roasted squash into noodle-like strands.
Step 5: Combine Ingredients
In a large mixing 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 your mixture into a greased casserole dish. Sprinkle with the remaining ½ cup of cheese on top.
Step 7: Bake Until Golden
Bake at 375°F for 20–25 minutes until hot and bubbly with a beautiful golden top.
Step 8: Serve
Let it cool slightly before serving. Enjoy this dish as either a satisfying side or light main course!
How to Serve Healthy Spaghetti Squash Au Gratin
This Healthy Spaghetti Squash Au Gratin makes for a versatile dish that can be enjoyed in various ways. Whether you serve it as a side or a main, these suggestions will elevate your dining experience.
As a Cozy Main Dish
- Pair with a simple green salad for a refreshing contrast.
- Serve alongside grilled chicken or fish to add protein.
With Seasonal Vegetables
- Roasted Brussels sprouts provide crunch and flavor.
- Steamed broccoli adds color and nutrition.
For a Holiday Spread
- Include in your Thanksgiving or Christmas feast as a healthy option.
- Offer alongside other comfort foods to balance richness.
Leftover Ideas
- Use any leftovers in a breakfast scramble with eggs.
- Reheat and serve on top of whole-grain toast for a quick meal.
How to Perfect Healthy Spaghetti Squash Au Gratin
To achieve the ultimate texture and flavor in your Healthy Spaghetti Squash Au Gratin, consider these helpful tips.
- Use Fresh Ingredients: Fresh onions and garlic enhance the dish’s flavor significantly.
- Don’t Overcook the Squash: Aim for tender strands but avoid mushiness for the best texture.
- Experiment with Cheeses: Try adding mozzarella or Parmesan for varied flavors.
- Adjust Seasonings: Feel free to tweak salt, pepper, and herbs to suit your taste preferences.
- Let It Rest: Allowing the dish to cool slightly before serving helps it set better.
- Double the Recipe: Make enough for leftovers; it reheats well!
Best Side Dishes for Healthy Spaghetti Squash Au Gratin
Complementing your Healthy Spaghetti Squash Au Gratin with the right sides can enhance your meal. Here are some excellent options:
- Garlic Roasted Asparagus: Toss asparagus spears with olive oil and garlic, then roast until crisp.
- Quinoa Salad: A light salad with quinoa, cucumbers, and lemon dressing offers freshness.
- Sautéed Spinach: Quickly sauté spinach with garlic for a nutrient-packed green side.
- Herbed Couscous: Fluffy couscous with herbs provides a lovely grain option that pairs well.
- Balsamic Glazed Carrots: Sweet carrots drizzled with balsamic vinegar create an appealing contrast.
- Crispy Sweet Potato Wedges: Oven-baked wedges seasoned with spices add sweetness and crunch.
- Classic Caesar Salad: The creamy dressing complements the cheesy gratin beautifully.
- Roasted Beet Salad: Earthy roasted beets mixed with greens offer vibrant color and flavor.
Common Mistakes to Avoid
When making Healthy Spaghetti Squash Au Gratin, it’s easy to overlook some key steps. Here are some common mistakes to avoid for a perfect dish.
- Using undercooked squash: Ensure you roast the spaghetti squash until fully tender. This enhances the flavor and texture of your dish.
- Skipping the sautéing step: Sautéing onions and garlic adds depth to the flavor. Don’t skip this step; it makes a big difference!
- Not seasoning enough: A pinch of salt and pepper can elevate your dish. Taste as you go and adjust seasoning to your preference.
- Overcrowding the casserole dish: If using a small dish, spread the mixture evenly. Crowding can lead to uneven cooking and a soggy top.
- Forgetting to let it cool slightly: Allowing the dish to cool for a few minutes helps set it, making serving easier and more enjoyable.

Storage & Reheating Instructions
Refrigerator Storage
- Store leftovers in an airtight container.
- Healthy Spaghetti Squash Au Gratin can be kept in the fridge for up to 4 days.
Freezing Healthy Spaghetti Squash Au Gratin
- Use freezer-safe containers or bags for storage.
- It can be frozen for up to 3 months; however, texture may change upon thawing.
Reheating Healthy Spaghetti Squash Au Gratin
- Oven: Preheat to 350°F (175°C) and bake covered for about 20 minutes until heated through.
- Microwave: Heat in short intervals, stirring occasionally, until hot; typically around 2-4 minutes.
- Stovetop: Place in a skillet over low heat, stirring occasionally until warmed through.
Frequently Asked Questions
Here are some common questions about making Healthy Spaghetti Squash Au Gratin.
Can I use other cheeses?
Yes! You can substitute sharp cheddar with mozzarella or gouda for different flavors.
Is Healthy Spaghetti Squash Au Gratin suitable for meal prep?
Absolutely! It stores well in the fridge and makes for quick meals throughout the week.
How do I know when my spaghetti squash is done cooking?
The squash should be fork-tender when roasted, easily shreddable into noodle-like strands.
Can I make this recipe dairy-free?
Yes! Substitute Greek yogurt with a non-dairy yogurt alternative and use plant-based cheese.
Final Thoughts
This Healthy Spaghetti Squash Au Gratin is not only comforting but also versatile enough for various occasions. You can customize it by adding your favorite veggies or proteins. Give it a try, and enjoy this delightful blend of flavors!
Healthy Spaghetti Squash Au Gratin
Indulge in the comforting flavors of Healthy Spaghetti Squash Au Gratin, a guilt-free dish that brings together creamy cheese and nutritious vegetables. Perfect for any occasion—from cozy weeknight dinners to festive holiday gatherings—this recipe offers the rich, cheesy goodness you crave while keeping your health goals in check. The star ingredient, spaghetti squash, not only adds delightful texture but also packs in fiber and nutrients. With its ease of preparation and crowd-pleasing taste, this dish is sure to impress friends and family alike.
- 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 (or sour cream)
- 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). Halve the spaghetti squash lengthwise and remove the seeds.
- Brush 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 over medium heat until softened, then add garlic for an additional minute.
- Once cool, shred the squash into noodle-like strands using a fork.
- In a large mixing bowl, combine shredded squash with sautéed onions and garlic, Greek yogurt, 1 cup cheese, salt, pepper, and optional seasonings.
- Transfer to a greased casserole dish and top with remaining cheese.
- Bake at 375°F (190°C) for 20–25 minutes until golden and bubbly.
Nutrition
- Serving Size: 1 serving
- Calories: 190
- Sugar: 3g
- Sodium: 360mg
- Fat: 12g
- Saturated Fat: 6g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 14g
- Fiber: 3g
- Protein: 9g
- Cholesterol: 30mg