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Healthy spaghetti squash au gratin in a white baking dish topped with golden cheese and fresh herbs.

Healthy Spaghetti Squash Au Gratin

This healthy spaghetti squash au gratin is a creamy, cheesy, low-carb comfort dish made with Greek yogurt, sharp cheddar, and roasted squash. It’s gluten-free, family-friendly, and perfect as a side or light main dish.

  • Total Time: 1 hour 5 minutes
  • Yield: 4 servings 1x

Ingredients

Scale
  • 1 medium spaghetti squash
  • 1 tbsp olive oil
  • 1 small onion, finely chopped
  • 2 cloves garlic, minced
  • 1/2 cup plain Greek yogurt
  • 1 cup shredded sharp cheddar cheese
  • 1/4 cup grated Parmesan cheese
  • Salt and black pepper, to taste
  • Optional: Fresh thyme or parsley for garnish

Instructions

  1. Preheat oven to 400°F (200°C). Slice squash in half lengthwise and remove seeds.
  2. Place squash cut-side down on a baking sheet and roast for 30–40 minutes until tender.
  3. Let squash cool slightly, then scrape strands into a bowl.
  4. Heat olive oil in a skillet, sauté onion until soft, add garlic, and cook 1 more minute.
  5. Add sautéed onion/garlic, yogurt, 3/4 cup cheddar, salt, and pepper to squash. Mix well.
  6. Transfer mixture to a greased baking dish. Top with remaining cheddar and Parmesan.
  7. Bake at 375°F (190°C) for 15–20 minutes until bubbly and golden. Broil last 2 mins for a crispy top.
  8. Let rest for 5–10 minutes before serving. Garnish with fresh herbs.

Notes

  • Drain squash in a colander if too watery.
  • Sub sour cream for yogurt if preferred.
  • Add cooked chicken or turkey for a heartier version.
  • Divide into ramekins for meal prep.
  • Author: Jennifer
  • Prep Time: 15 minutes
  • Cook Time: 50 minutes
  • Category: Side Dish
  • Method: Baking
  • Cuisine: American
  • Diet: Gluten Free

Nutrition

  • Serving Size: 1/4 of recipe
  • Calories: 210
  • Sugar: 4g
  • Sodium: 280mg
  • Fat: 13g
  • Saturated Fat: 6g
  • Unsaturated Fat: 6g
  • Trans Fat: 0g
  • Carbohydrates: 10g
  • Fiber: 2g
  • Protein: 12g
  • Cholesterol: 30mg

Keywords: spaghetti squash au gratin, low-carb casserole, healthy side dish, gluten-free comfort food