Description

This Healthy Spaghetti Squash Au Gratin is a creamy, cheesy, and low-carb comfort dish that transforms roasted spaghetti squash into a rich yet light meal. With a garlicky cheese sauce and golden bubbly top, it’s the perfect wholesome alternative to traditional potato au gratin.

Ingredients

1 medium spaghetti squash

1 tablespoon olive oil

1 small onion, finely chopped

2 cloves garlic, minced

1/2 cup Greek yogurt or sour cream

1/2 cup shredded cheddar cheese (plus extra for topping)

1/4 cup grated Parmesan cheese

1/4 teaspoon salt

1/4 teaspoon black pepper

1/4 teaspoon smoked paprika (optional)

2 tablespoons chopped fresh parsley or chives, for garnish

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Instructions

Preheat the oven to 400°F (200°C) and line a baking sheet with parchment paper.
Cut the spaghetti squash in half lengthwise and scoop out the seeds. Brush the insides with olive oil, season with salt and pepper, and place cut-side down on the baking sheet.
Roast for 35–40 minutes until the flesh is tender and strands easily pull apart with a fork. Let cool slightly, then use a fork to scrape out the strands into a large bowl.
While the squash bakes, sauté the onion and garlic in a skillet over medium heat until soft and fragrant.
Add the sautéed onion and garlic to the squash strands, then stir in Greek yogurt (or sour cream), cheddar cheese, Parmesan cheese, and smoked paprika. Season with additional salt and pepper to taste.
Transfer the mixture to a lightly greased baking dish, spread evenly, and sprinkle extra cheese on top.
Bake at 375°F (190°C) for 15–20 minutes, until the top is golden and bubbly.
Remove from the oven, garnish with chopped parsley or chives, and serve warm.

Notes

Swap cheddar for Gruyère, mozzarella, or feta for different flavor profiles.

Add cooked bacon, ham, or sautéed mushrooms for extra heartiness.

To make it dairy-free, use vegan cheese and plant-based yogurt.

For a crispy top, sprinkle breadcrumbs or crushed pork rinds before baking.

Store leftovers in an airtight container for up to 3 days or freeze before baking for up to 2 months.

Prep Time: 10 minutes
Cook Time: 45 minutes
Category: Side Dish
Method: Baking
Cuisine: American

Nutrition

Serving Size: 1 serving
Calories: 190
Sugar: 5 g
Sodium: 320 mg
Fat: 11 g
Saturated Fat: 5 g
Unsaturated Fat: 5 g
Trans Fat: 0 g
Carbohydrates: 12 g
Fiber: 3 g
Protein: 11 g
Cholesterol: 25 mg