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Overhead photo of gluten free spaghetti squash casserole with a spoon in it.

Spaghetti Squash Casserole Recipe


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  • Author: Lindsay Cotter
  • Total Time: 75 to 80 minutes
  • Yield: 5 servings 1x
  • Diet: Gluten Free

Description

Treat yourself to a comfort food you can feel good about with this easy, vegetarian, gluten-free spaghetti squash casserole recipe!


Ingredients

Units Scale
  • 2 to 3 pound spaghetti squash (3-4 cups noodles)
  • Sea salt, divided
  • 1 Tablespoon light olive oil
  • 2/3 to 1 cup chopped onion (~1 small onion)
  • 2 cups chopped broccoli
  • 1 cup baby spinach
  • Pinch black pepper

Sauce

  • 1/2 cup cream cheese or dairy free cream cheese
  • 1/2 cup marinara sauce (see notes)
  • 2 to 3 Tablespoons parmesan cheese
  • 1 teaspoon garlic powder
  • 1 teaspoon onion powder
  • 1 teaspoon Italian seasoning
  • 1/2 teaspoon kosher salt
  • 1/2 teaspoon black pepper
  • 1/4 to 1/2 teaspoon red pepper flakes
  • Optional mix-ins – 1 cup cooked shredded chicken or precooked turkey/pork sausage (diced or ground)

Topping

  • 1 to 1 1/4 cups organic shredded cheese or dairy-free shredded cheese substitute

Garnish

  • Fresh parsley, chopped

Instructions

  1. Preheat the oven to 400 Fahrenheit and line a baking pan with aluminum foil. Set aside.
  2. Slice the squash in half (removing the seeds), sprinkle with sea salt, and place it face down on the prepared baking pan. Roast for 45 minutes or until fork-tender. (See notes for a faster method.)

Notes

Quick Method for Cooking SquashAir Fryer Spaghetti Squash

Alternative Pan – If not using an oven-safe skillet, transfer the squash/sauce mixture into an 8×8” casserole dish or baking pan sprayed with cooking oil. Cover with cheese and bake for 20 to 25 minutes.

Substitute Tips – Substitute cream cheese with dairy free cream cheese or thick hummus in the casserole (taste and texture will vary) and dairy free shredded cheese for the topping.

 Prep Tip – If the spaghetti squash is larger than 3 pounds use up to ¾ cup marinara sauce.

  • Prep Time: 15 to 20 minutes
  • Cook Time: 60 minutes
  • Category: dinner
  • Method: Stove Top, Oven
  • Cuisine: American

Nutrition

  • Serving Size:
  • Calories: 263
  • Sugar: 7 g
  • Sodium: 457.2 mg
  • Fat: 18.1 g
  • Saturated Fat: 7.4 g
  • Carbohydrates: 17.9 g
  • Fiber: 3.9 g
  • Protein: 10 g
  • Cholesterol: 34.5 mg