Meat Lovers Spaghetti Squash Casserole This low carb and keto spaghetti squash casserole is super cheesy and filled with beef and sausage and topped with pepperoni then baked in the oven! It is full of yummy Italian flavors and only 7 net carbs per serving!

spaghetti squash casserole

I think this Spaghetti Squash Casserole is my new favorite recipe on the blog.  You see, I am not ashamed to admit that I ate the whole casserole.  It was my lunch for over a week and I think I could eat it everyday if I had to!

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I have really grown fond of spaghetti squash, especially after I learned the best way to roast it for ultimate flavor!  I featured that in my recipe for spaghetti squash soup.

I made this the ultimate spaghetti squash casserole by loading it with my favorite pizza flavor…meat lovers!  This casserole is full of ground beef, sausage, pepperoni, and mozzarella cheese.  So delicious!


To get started, cook your spaghetti squash and remove the flesh.  I give you instructions for my favorite in the recipe card.

While the spaghetti squash is cooking, you can go ahead and get the ground meats cooked.  Cook them in the same skillet to save some time.

Now we just assemble everything right in the baking dish and mix it all up!

baked spaghetti squash casserole

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That would be the spaghetti squash, marinara, ground beef and sausage, and cheese.

Mix it up really well, flatten it out a little, top with with more cheese, the pepperoni, then bake it in the oven!

spaghetti squash pizza casserole

It is a bubbling beauty when you pull it out of the oven.  I’m obsessed.


Check out my other casserole recipes that are just as amazing as this one:

baked spaghetti squash casserole

Meat Lovers Spaghetti Squash Casserole

This low carb and keto spaghetti squash casserole is super cheesy and filled with beef and sausage and topped with pepperoni then baked in the oven! It is full of yummy Italian flavors and only 7 net carbs per serving! 
5 from 4 votes
Course: dinner
Cuisine: American, Italian
Keyword: spaghetti squash casserole recipe
Prep Time: 10 minutes
Cook Time: 1 hour
Total Time: 1 hour 10 minutes
Servings: 8


  • 4 Cups Cooked Spaghetti Squash flesh
  • I 24 ounce jar Rao's Marinara
  • 1/2 pound Ground beef, cooked and crumbled
  • 1/2 pound Ground sausage, cooked and crumbled
  • 3 Cups Shredded Mozzarella cheese
  • Salt and pepper to taste
  • 40 Pepperonis


  • Pre-heat the oven to 350F.  Spray an 9 X 13 casserole dish with cooking spray
  • Add the spaghetti squash, marinara, ground beef, sausage, and 2 cups of the mozzarella to the casserole and stir to combine.  Season with salt and pepper to taste.  Top with remaining cheese.  
  • Top with the pepperonis in a single layer.  Bake in the pre-heated oven for 25-30 minutes until hot and bubbly.  Remove from the oven, let cool for 5 minutes and serve.


Nutrition per serving (8 servings total):395 calories / 30g fat / 12g sat fat / 9g carbs / 2g fiber / 23g protein
My favorite way to cook spaghetti squash:
Pre-heat the oven to 460F. Using a fork or sharp knife, poke holes in the spaghetti squash and microwave for 5 minutes. Let cool enough to handle. Cut the squash in half lengthwise, remove the seeds, and brush each side 1 tbsp of avocado oil and season with 1/4 tsp of salt. Place face down on a baking sheet and roast for 20-25 minutes until tender.  Remove from the oven, let cool to handle, and scrape out the flesh with a fork.
Use code LOWCARBJ for 20% off at Lakanto (my favorite low carb sweetener)CLICK HERE TO LEARN MORE!

⭐ Did you make this Spaghetti Squash Casserole Recipe?  Tag me on Instagram so I can see!  @lowcarbwithjennifer


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    • carol king
    • June 25, 2019

    OMG! This is so good and satisfies my pasta craving for spaghetti…

    • Shadi Hasanzadenemati
    • June 16, 2019

    • Love how easy and delicious Spaghetti Squash casserole is. It’s perfect for a gathering or a party.

    • Robin G
    • June 16, 2019

    So yummy and satisfying!

    • Laurel
    • April 8, 2019

    This recipe was a huge hit with my family! Though I am the only one who pays any attention to carbs, the family went back for seconds and thirds. I’m making it again tonight as we all loved it so much.

    • LynnM
    • March 7, 2019

    So delicious! Love the simplicity of the ingredients that taste so awesome together! Thank you SO much!

    • Jen
    • February 6, 2019

    I found your site over on instagram and so glad I did. This looks amazing and my family will love this. I plan on making it this weekend for them. My kids are not full on low carb, so when I can serve them something like this that doesn’t sacrifice any of the taste of pizza than I’m all for it. Than ks

    • Janice
    • February 2, 2019

    How many spaghetti squash to get the 4 cups?

      • jenniferbanz
      • February 3, 2019

      I only use 1

    • Lori
    • February 2, 2019

    Jennifer! How did you know I needed this?!?? It was so good!! It fulfilled a pizza craving I was having, without having to make a crust. Cheesy, meaty, one-dish meal; THANK YOU!

      • jenniferbanz
      • February 3, 2019

      So glad you liked it!

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