Spaghetti Squash Lasagna Recipe {Low-Carb}

by Amanda C. Hughes

I feel like squash is supposed to be off-limits if you want to stay in ketosis, but spaghetti squash is surprisingly low-carb and even less carb when you distract the dish with meatballs! And so, my low-carb spaghetti squash lasagna recipe was born. I knew I’d need to fatten it up, so I rolled up a few dozen tiny meatballs and added them as a major layer to the mix.

Low-Carb Spaghetti Squash Lasagna Recipe

Servings: 4

Prep Time: 20 minutes | Cook Time: 50 minutes | Total Time: 1 hour 10 minutes

Nutritional Facts: 7g Net Carbs| 392 Calories | 72g Fat | 9g Carbs | 31g Protein | 2g Fiber

Ingredients:

  • 1 Medium to large spaghetti squash

For the meatballs:

  • 1 lb grass fed ground beef
  • 1 cup grated parmesan
  • 1 tsp chili powder
  • 1/2 tsp oregano
  • 1/2 tsp basil
  • 2 cloves minced garlic
  • 2 grinds of fresh sea salt
  • 3 grinds of freshly cracked pepper
  • 1 large egg

For the sauce:

  • 3 cups naturally low-carb tomato sauce
  • 1 tsp crushed red pepper flakes

For layering:

  • 2 cups, shredded mozzarella cheese

Steps:

  1. Preheat oven to 350F. Slice your spaghetti squash in half the long way, using a large knife. Remove the seeds and goop. Place both sides, squash side up, on a baking sheet and bake for an hour at 350. It’s ready when you can easily use a spoon to scoop out the innards. Note: If you want to bake the lasagna in the shell, be careful when removing “spaghetti”, it’s easy to poke a hole in the rind once cooked.
    spaghetti squash lasagna
  2. In the meantime, pour your chosen sauce into a medium saucepan over low heat, covered, and add red pepper flakes. Let simmer with the cover on to prevent annoying splashes of sauce all over.
    spaghetti squash lasagna
  3. Mix meatball ingredients in a bowl and roll into quarter-sized mini meatballs.
    Spaghetti Squash Lasagna
    Spaghetti Squash Lasagna
  4. Heat a large skillet over medium heat with your choice of cooking oil (I like olive oil or ghee) Cook meatballs in the frying pan and cover. Flip when halfway browned (approx 3-5 minutes). When meatballs are cooked through, uses a slotted spoon to add them (without the grease and fatty aftermath) into the sauce and let marinate. Reduce to a low or warm setting.
    spaghetti squash lasagna
  5. If you have preserved the spaghetti squash shells, put them back on the baking sheet if they aren’t already. Otherwise, you can use a bread-sized baking dish. In your baking vehicle of choice, layer sauce, squash, meatballs, sauce, mozzarella, squash, meatballs, sauce, mozzarella. Then bake on 350 for 30 minutes.
    Spaghetti Squash Lasagna
    Spaghetti Squash Lasagna
    Spaghetti Squash Lasagna
    Spaghetti Squash Lasagna
    Spaghetti Squash Lasagna
  6. Remove the spaghetti squash lasagna from the oven, and garnish with chopped basil or parsley if you like. Otherwise, serve and enjoy!
    Spaghetti Squash Lasagna
    spaghetti squash lasagna
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Spaghetti Squash Lasagna Recipe {Low-Carb}

5 from 3 reviews

I feel like squash is supposed to be off-limits if you want to stay in ketosis, but spaghetti squash is surprisingly low-carb and even less carb when you distract the dish with meatballs!

  • Author: Amanda C. Hughes
  • Prep Time: 20 minutes
  • Cook Time: 50 minutes
  • Total Time: 1 hour 10 minutes
  • Yield: 4 Servings 1x
  • Category: Dinner

Ingredients

Scale
  • 1 Medium to large spaghetti squash

For the meatballs:

  • 1 lb grass fed ground beef
  • 1 cup grated parmesan
  • 1 tsp chili powder
  • 1/2 tsp oregano
  • 1/2 tsp basil
  • 2 cloves minced garlic
  • 2 grinds of fresh sea salt
  • 3 grinds of freshly cracked pepper
  • 1 large egg

For the sauce:

  • 3 cups naturally low-carb tomato sauce
  • 1 tsp crushed red pepper flakes

For layering:

  • 2 cups, shredded mozzarella cheese

Instructions

  1. Preheat oven to 350F. Slice your spaghetti squash in half the long way, using a large knife. Remove the seeds and goop. Place both sides, squash side up, on a baking sheet and bake for an hour at 350. It’s ready when you can easily use a spoon to scoop out the innards. Note: If you want to bake the lasagna in the shell, be careful when removing “spaghetti”, it’s easy to poke a hole in the rind once cooked.
  2. In the meantime, pour your chosen sauce into a medium saucepan over low heat, covered, and add red pepper flakes. Let simmer with the cover on to prevent annoying splashes of sauce all over.
  3. Mix meatball ingredients in a bowl and roll into quarter-sized mini meatballs.
  4. Heat a large skillet over medium heat with your choice of cooking oil (I like olive oil or ghee) Cook meatballs in the frying pan and cover. Flip when halfway browned (approx 3-5 minutes). When meatballs are cooked through, uses a slotted spoon to add them (without the grease and fatty aftermath) into the sauce and let marinate. Reduce to a low or warm setting.
  5. If you have preserved the spaghetti squash shells, put them back on the baking sheet if they aren’t already. Otherwise, you can use a bread-sized baking dish. In your baking vehicle of choice, layer sauce, squash, meatballs, sauce, mozzarella, squash, meatballs, sauce, mozzarella. Then bake on 350 for 30 minutes.
  6. Remove the spaghetti squash lasagna from the oven, and garnish with chopped basil or parsley if you like. Otherwise, serve and enjoy

Nutrition

  • Serving Size: 4
  • Calories: 392
  • Fat: 72g
  • Carbohydrates: 9g
  • Fiber: 2g
  • Protein: 31g

If you’re looking for other ways to prepare spaghetti squash then you have to try my delicious Roasted Chicken + Creamy Cajun Spaghetti Squash Pasta recipe next.

Note: This recipe was originally published in 2013 and has been updated.

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52 comments

New favorite recipe: Spaghetti Squash Lasagna | Adventures in Ketosis October 5, 2014 - 1:21 pm

[…] Just trying to get caught up a bit as I haven’t posted for a few weeks. I found this recipe for low carb Spaghetti Squash Lasagna and can’t get enough of it. http://www.wickedstuffed.com/keto-recipes/low-carb-spaghetti-squash-lasagna-recipe-9-net/ […]

Jay Reaser November 22, 2014 - 1:45 am

Just starting out with the Ketogenic way of eating any advice would be appreciated

jessmessblog May 14, 2016 - 10:01 am

Of all the low carb foods I’ve tried, I have yet to do anything with spaghetti squash.  Bookmarking this one because it sounds so good I have to try it!

ErStar October 10, 2016 - 3:38 pm

This was amazing.  I wouldn’t change an thing about this receipt!! I will be making this more often!!

Spaghetti Squash Lasagna | The Raging Kilt March 5, 2017 - 3:36 pm

[…] Special thanks to Wicked Stuff […]

Renee April 22, 2017 - 4:11 pm

Beautiful site, images!

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[…] for other tasty squash noodle dishes? Try my Low-Carb Spaghetti Squash Lasagna Recipe […]

Roasted Chicken + Creamy Cajun Spaghetti Squash Pasta - February 22, 2019 - 5:54 pm

[…] for other new ways to prepare spaghetti squash? Try my Low-Carb Spaghetti Squash Lasagna recipe […]

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[…] hearty meal made of high quality, delicious ingredients. If you love spaghetti squash, check out my Spaghetti Squash Lasagna, and my Creamy Cajun Chicken Spaghetti […]

Jennifer Leahy October 8, 2019 - 8:59 am

Actually there are 14 carbs (11 net) in two cups of spaghetti squash, and only 2.8g – this information comes directly from the USDA. Two cups is a bit of a large serving / bad example. I eat spaghetti squash in moderation all the time and it has no effect on ketosis.


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I love this so much, I make it often.

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Kathryn Newport April 19, 2021 - 7:10 pm

Hello,
I noticed in this recipe you roast your spaghetti squash cut side up. But in another recipe you say to roast cut side down (I like it down because it gets more caramelized and I think it cooks faster). What is your reason for choosing up or down for a recipe? All your recipes are yummy so I am thinking your have a reason for the variance in methods.
Thanks in advance for your response.

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Abdul June 26, 2022 - 11:58 am

This is an incredible recipe, I can’t wait to try it out

Harsh May 10, 2023 - 12:13 am

Thanks for providing this tasty recipes and also please try to provide other recipes in the same way

Comments are closed.