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Italian Spaghetti Squash Bake {Grain-free, gluten-free, paleo-friendly option} | Lexi's Clean Kitchen
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4.60 from 5 votes

Italian-Style Spaghetti Squash Casserole

This Italian-Style Spaghetti Squash Casserole is such a flavorful, simple, and healthy dinner casserole when you are craving comfort food! It's low carb, gluten-free, and hearty!
Prep Time5 minutes
Cook Time50 minutes
Total Time55 minutes
Course: Dinner
Method: Baking
Servings: 4
Author: Lexi


Spaghetti Squash:

  • 1 Spaghetti squash sliced in half and seeds scooped out
  • 2 teaspoons extra-virgin olive oil
  • 1/2 teaspoons sea salt
  • 1/2 teaspoon black pepper

Other Ingredients:

  • 1 teaspoon extra-virgin olive oil
  • 1 clove garlic crushed
  • 3 handfuls fresh spinach
  • 1 lb. organic boneless chicken breasts baked or boiled and shredded
  • 1 cup tomato sauce of choice homemade or store-bought
  • 1 egg
  • 1 1/2 tablespoons Italian seasoning more to taste
  • 1/2 tsp red pepper flakes more to taste
  • 1 tablespoon garlic powder
  • 1/2 teaspoon freshly ground pepper
  • 1/2 teaspoon salt
  • Optional: 1/4 cup fresh parmesan cheese more for topping


  • Preheat the oven to 375 °F.
  • Cut spaghetti squash in half and scoop out seeds. Drizzle with olive oil, sea salt, and black pepper.
  • Line baking sheet with parchment paper.
  • Lay spaghetti squash face down on baking sheet, and add 1/4 cup water. Bake for about 30 minutes until fork tender. Let cool.
  • Once cool, scrape out spaghetti squash using a fork and place in a medium mixing bowl and set aside.
  • In a small skillet over medium-heat, heat oil and sauté garlic. Add spinach and sauté until wilted.
  • Add spinach and garlic mixture, shredded chicken, tomato sauce, egg, cheese if using and spices to the bowl with the spaghetti squash. Mix until well combined.
  • Transfer entire mixture to a baking dish.
  • Sprinkle with fresh parmesan and red pepper flakes
  • Bake at 375 °F for 10 minutes. Broil on high for 3-5 minutes, or until the cheese has started to bubble and brown.
  • Serve warm!


Calories: 287kcal | Carbohydrates: 7.7g | Protein: 36g | Fat: 12.3g | Saturated Fat: 3.1g | Cholesterol: 142mg | Sodium: 980mg | Fiber: 1.4g | Sugar: 2.8g