This recipe for baked Spaghetti Squash Casserole takes the carbs out of the traditional pasta dish and loads it with tons of flavor.

Tender chicken meatballs are nestled in spaghetti squash, topped with a zesty sauce and lots and lots of cheese!  Serve with a crispy side salad!

Spaghetti Squash Casserole in a casserole dish

Chicken Spaghetti Squash Casserole

© Easy Low

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A Fave Low Carb Casserole

Low carb has never tasted so good! This easy recipe can be prepared with meatballs or even just browned ground beef or chicken with onions, either way, it’s so delicious!

  • Full of flavor and easy to make
  • The whole family loves this casserole
  • Freezes and reheats well
  • Add any veggies you’d like

How to Bake Spaghetti Squash

Spaghetti squash is super easy to bake  or air fry and a great base for many sauces or casseroles.

  1. Cut squash in half vertically, scoop out seeds.
  2. Brush with oil and season with salt and pepper.
  3. Bake with cut sides down for about 50 or 60 minutes.

process of adding squash and seasonings to casserole dish

No time to make meatballs? Use ready-made sausage, beef, or turkey meatballs or simply brown the meat in a pan while the squash cooks.

How to Make Spaghetti Squash Casserole

  1. Cook Squash: Bake or microwave the squash per the recipe below until tender. Scrape into strands and place them in the bottom of a casserole dish.
  2. Cook Meatballs: Or use precooked meatballs! Place on the spaghetti squash.
  3. Top with Sauce and Bake: Combine the pasta sauce and tomatoes. Spread over the meatballs and of course, add a generous dose of cheese!

process of adding meatballs and sauce to dish to make Spaghetti Squash Casserole

Recipe Tips

  • Broil the baked casserole for about 3 minutes to brown the cheese.
  • Sprinkle the top with bacon bits for extra flavor!
  • Pre-made alfredo sauce can be used in place of tomato-based pasta sauce in a pinch!

Spaghetti Squash Casserole with a spoon taking some out

Other Low Carb Recipes To Try!

Spaghetti Squash Casserole in a casserole dish
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Spaghetti Squash Casserole

This tasty baked spaghetti squash casserole is easy to make so it's perfect for weeknight meals.
Prep Time 20 minutes
Cook Time 1 hour 25 minutes
Total Time 1 hour 45 minutes
Servings 6 servings
Author Holly



  • 1 large spaghetti squash about 4 lbs
  • 1 tablespoon olive oil
  • 1 tablespoon butter
  • 3 cups low carb pasta sauce
  • 14 oz canned diced tomatoes drained
  • 1 ½ cups mozzarella cheese
  • 2 tablespoons parmesan cheese


  • 1 lb ground chicken or turkey
  • 1 egg
  • 2 tablespoons parmesan cheese
  • 1 clove garlic minced
  • 2 tablespoons almond flour
  • 1 teaspoon Italian seasoning
  • salt & pepper to taste


  • Preheat oven to 375°F.
  • Cut spaghetti squash in half and scoop out the seeds. Brush the cut side with olive oil and season with salt and pepper.
  • Place cut side down in a small dish and bake 50-60 minutes or until tender when poked with a fork.
  • Combine all meatball ingredients, roll into 24 small meatballs and place on a rimmed baking sheet.
  • Add meatballs to the oven along with the squash and bake 18-20 minutes or until cooked through and meatballs reach 165°F.
  • Once squash is tender, scrape the flesh of the squash with a fork to make strands. Toss with butter, season with salt and pepper, then place in the bottom of a baking dish.
  • Combine pasta sauce and diced tomatoes. Spoon over meatballs.
  • Top with cheeses and bake 25 minutes or until heated through and bubbly.
  • Garnish with parsley if desired and serve.
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Nutrition Information

Calories: 358kcal | Carbohydrates: 22g | Protein: 25g | Fat: 21g | Saturated Fat: 8g | Trans Fat: 1g | Cholesterol: 122mg | Sodium: 1065mg | Potassium: 1140mg | Fiber: 5g | Sugar: 12g | Vitamin A: 1120IU | Vitamin C: 18mg | Calcium: 275mg | Iron: 4mg

Nutrition information provided is an estimate and will vary based on cooking methods and brands of ingredients used.

Course Main Course
Cuisine American

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About the author

At Easy Low Carb® we believe that every meal should be full of big bold flavor! From amazing main dishes and simple sides to the best party snacks, reducing carbs doesn’t mean giving up your favorites!
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  1. 5 stars
    I honestly prefer this over regular spaghetti… this dish is so delicious. This was also my first time trying ground chicken. Mannnn I’m gonna use chicken instead of beef for burgers and meatballs from now on. Those meatballs were THAT good.

  2. 5 stars
    I made this for dinner last Wednesday and it was delicious! I’m pretty sure it’s my new favorite way to eat spaghetti squash! 🙂

    This was amazing! My husband raved about and asked me to make it again two days later 🙂