Spaghetti Squash Casserole

This Spaghetti Squash Casserole is not only gluten-free, low carb, and Paleo, it is a satisfying, delicious hearty yet healthy casserole made with spaghetti squash, sausage, and marinara sauce. 

I adore spaghetti squash.

It is an easy vegetable to use in place of carbs or just in addition to a healthy diet to incorporate more veggies into your diet.

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But spaghetti squash on it’s own, can be a bit bland in flavor. When paired with spicy Italian Sausage and Homemade Tomato Sauce, spaghetti squash becomes the base for a delicious, flavorful casserole.

Spaghetti Squash Casserole

This “spaghetti” bake is a simple casserole dish made with only 5 key ingredients.

The Spaghetti Squash Casserole is gluten-free, dairy-free, and Paleo. It is full of protein, fiber, nutrients, but most importantly, FLAVOR!

Ingredients for Spaghetti Squash Casserole

• 1 pound Italian sausage
  • chicken, turkey or pork
• Onion
• Garlic
• Tomato sauce (or your favorite jarred sauce)
  • Be sure to omit sugar from homemade sauce or use no added sugar sauce to keep this Paleo and Keto Friendly.
• 3 eggs, whisked
• 1 large spaghetti squash

How to make Spaghetti Squash Casserole

Step One: Roast Spaghetti Squash

• Start by cutting the squash in half and scooping out the seeds.
• Place squash face down on baking sheet.
• Roast the squash for 35 minutes at 400 degrees.
• Once squash is finished cooking and cool enough to handle, scoop out strands of squash and place in large bowl.
• For more detailed instructions on roasting spaghetti squash, see here. 

Step Two: Prepare Spaghetti Squash Casserole

• While the squash is roasting, brown the sausage and onions together until the sausage is cooked through.
• Add in garlic and oregano and cook for 1-2 minutes longer.
• Drain off any excess grease.
• Add meat mixture to spaghetti squash.

• Add in whisked eggs and 2 cups of the tomato sauce to squash mixture and mix well.
• Season with salt and pepper if your sausage or sauce was not well seasoned.
• Transfer mixture to a greased 8×8 dish and bake for 1 hour or until top is bubbly and browned.

Note on Spaghetti Squash Casserole

• Feel free to use any raw Italian sausage you like, just be sure to read label to ensure it is gluten-free, if needed.
• If you are not dairy-free or Paleo, this casserole is delicious topped with Mozzarella or Parmesan cheese before being baked.

More Paleo Dinner Recipes

• Paleo Veggie Burgers
• Crock Pot Pork and Sauerkraut
• Skillet Pork Tenderloin with Cabbage
• Gluten Free Eggplant Parmesan

Spaghetti Squash Casserole Recipe

5 from 4 votes

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Spaghetti Squash Casserole

A delicious, hearty Italian casserole made with Spaghetti Squash that is gluten-free, keto friendly, low carb, and Paleo. 

Course Main Course

Cuisine Italian

Keyword Spaghetti Squash Casserole

Prep Time 15 minutes

Cook Time 1 hour 35 minutes

Total Time 1 hour 50 minutes

Servings 6

Calories 231 kcal

Ingredients

• 1 large spaghetti squash
• 1 pound Italian sausage
• 3 eggs
• 3 cups spaghetti sauce
• 2 tablespoon olive oil divided
• 1 teaspoon dried oregano
• 1 onion minced
• 3 cloves garlic minced

Instructions

Prepare Spaghetti Squash

1. Preheat oven to 400 degrees. 

2. Cut the squash in half and scoop out the seeds. Place cut side down on a baking sheet that has been lightly greased with olive oil and roast for 35 minutes. After squash is baked, reduce oven heat to 350 degrees. 

3. Once cool enough to handle, remove strands of spaghetti squash and place in large bowl. 

Prepare Casserole

1. While the squash is roasting, brown the sausage and onions together in 1 tablespoon olive oil, until the sausage is cooked through. Add in the garlic and oregano and saute for 1-2 minutes longer.  Remove from heat and drain off excess grease.  

2. Add sausage mixture, whisked eggs, and 2 cups of the sauce to the spaghetti squash and mix well. 

3. Transfer mixture to an 8x8 dish and cover with remaining 1 cup of sauce. 

4. Bake for 1 hour at 30 degrees or until top is bubbly and browned. (

Nutrition Facts

Spaghetti Squash Casserole

Amount Per Serving

Calories 231 Calories from Fat 117

% Daily Value*

Total Fat 13g 20%

Saturated Fat 3g 15%

Cholesterol 121mg 40%

Sodium 1375mg 57%

Potassium 617mg 18%

Total Carbohydrates 12g 4%

Dietary Fiber 2g 8%

Sugars 8g

Protein 16g 32%

Vitamin A 15.2%

Vitamin C 40.5%

Calcium 5.1%

Iron 49.6%

* Percent Daily Values are based on a 2000 calorie diet.