Go Back

Cheesy Spaghetti Squash Gratin

A creamy and cheesy gratin featuring tender spaghetti squash strands, sautéed onions and garlic, and a blend of cheddar and Parmesan cheeses. Baked to golden perfection, this dish is a delightful low-carb alternative to traditional gratins.
Prep Time 15 minutes
Cook Time 45 minutes
Total Time 1 hour
Course Side Dish
Cuisine American
Servings 4
Calories 290 kcal

Ingredients
  

  • 1 medium spaghetti squash
  • 2 tablespoons butter
  • 1 small onion finely chopped
  • 2 cloves garlic minced
  • ½ cup sour cream
  • 1 cup shredded cheddar cheese divided
  • ¼ teaspoon salt
  • ¼ teaspoon black pepper
  • ¼ teaspoon paprika
  • 2 tablespoons grated Parmesan cheese

Instructions
 

  • Preheat the oven: Set your oven to 375°F (190°C). Grease a baking dish with butter or cooking spray.
  • Prepare the squash: Cut the spaghetti squash in half lengthwise and scoop out the seeds. Place the halves cut side down on a baking sheet lined with parchment paper. Roast for 30–40 minutes, or until the squash is tender and easily pierced with a fork.
  • Shred the squash: Once roasted, use a fork to scrape the flesh of the squash into spaghetti-like strands. Set aside.
  • Sauté aromatics: In a large skillet, melt butter over medium heat. Add the chopped onion and minced garlic, cooking for 2–3 minutes until softened and fragrant.
  • Combine ingredients: Stir in the sour cream, ½ cup of cheddar cheese, salt, pepper, and paprika. Cook for another 2–3 minutes until the cheese is melted and the mixture is smooth.
  • Mix squash and sauce: Add the cooked spaghetti squash strands to the skillet, mixing well to combine.
  • Transfer to baking dish: Transfer the mixture to the prepared baking dish.
  • Add toppings: Sprinkle the remaining ½ cup of shredded cheddar cheese and grated Parmesan over the top.
  • Bake: Bake for 15–20 minutes, or until the top is golden and bubbly.
  • Serve: Serve warm and enjoy the creamy, cheesy goodness of this spaghetti squash gratin!

Notes

  • For added flavor, consider mixing in cooked bacon bits or sautéed mushrooms.
  • Ensure the squash is fully cooked and tender before scraping to achieve the best texture.
  • This dish pairs well with grilled chicken or a fresh green salad.
Keyword spaghetti squash gratin, cheesy vegetable casserole, low-carb gratin, vegetarian side dish, baked spaghetti squash