Print

Spaghetti Squash Au Gratin

Spaghetti Squash Au Gratin

This easy Spaghetti Squash Au Gratin is a comforting and wholesome dish that combines tender spaghetti squash strands with a creamy, garlic-infused cheese sauce, topped with a golden, melted crust. It offers a low-carb, vegetarian-friendly alternative to traditional au gratin casseroles and is perfect as a satisfying main or versatile side dish.

Ingredients

Scale

Main Ingredients

  • 1 medium spaghetti squash
  • 2 tablespoons butter
  • 2 tablespoons all-purpose flour
  • 2 cups whole milk
  • 2 cloves garlic, minced
  • 1 cup sharp cheddar cheese, grated
  • 1/2 cup Parmesan cheese, grated
  • Salt and pepper, to taste
  • 1/2 cup bread crumbs (optional, for topping)

Instructions

  1. Prepare the Spaghetti Squash: Preheat your oven to 400°F (200°C). Slice 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 40 minutes until the squash is tender. When cool enough to handle, use a fork to shred the flesh into spaghetti-like strands and set aside.
  2. Make the Cheese Sauce: In a medium saucepan, melt the butter over medium heat. Add the minced garlic and sauté until fragrant, about 1 minute. Stir in the flour and cook for 2 minutes, whisking constantly until bubbly and lightly golden. Gradually whisk in the milk and continue to cook and whisk until the sauce thickens, about 5 minutes.
  3. Combine Cheese and Season: Remove the sauce from heat and stir in the grated sharp cheddar and Parmesan cheese until melted and smooth. Season with salt and pepper to taste.
  4. Assemble and Bake: Gently fold the spaghetti squash strands into the cheese sauce. Transfer the mixture to a buttered baking dish. If desired, sprinkle bread crumbs on top for a crunchy crust. Bake in the preheated oven at 375°F (190°C) for 20-25 minutes until bubbly and golden brown on top.

Notes

  • Don’t overcook the squash: Keep it tender but still firm for the best texture.
  • Use whole milk for a creamier sauce.
  • Grate cheese fresh to ensure better melting and smoothness.
  • Season gradually to avoid over-salting the sauce.
  • Let the dish rest for a few minutes after baking to set before serving.

Nutrition

Keywords: spaghetti squash, au gratin, low carb, vegetarian, cheesy casserole, healthy comfort food, gluten free