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.

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

Spaghetti Squash Casserole

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

5 from 5 votes

Print Pin Rate

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: 231kcal

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

• Preheat oven to 400 degrees. 
• 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. 
• Once cool enough to handle, remove strands of spaghetti squash and place in large bowl. 

Prepare Casserole

• 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.  
• Add sausage mixture, whisked eggs, and 2 cups of the sauce to the spaghetti squash and mix well. 
• Transfer mixture to an 8x8 dish and cover with remaining 1 cup of sauce. 
• Bake for 1 hour at 350 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.