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Slow Cooker Spaghetti Squash Pizza Casserole (Low Carb)

There are only a few ingredients in this slow cooker spaghetti squash pizza casserole recipe. This healthy, low-carb alternative to spaghetti cooks in just a couple of hours time.

There are only a few ingredients in this slow cooker spaghetti squash casserole recipe. This healthy, low-carb alternative to spaghetti cooks in just a couple of hours time.

What Is Spaghetti Squash?

Spaghetti squash is a cucurbita pepo vegetable. In other words, it’s a squash. The seeds inside spaghetti squash are similar to pumpkin seeds. When cooked, the inside flesh is scraped into spaghetti-like strands. Hence why spaghetti squash exploded on the scene a few years ago as a popular, healthy,  alternative to spaghetti. You can cook spaghetti squash several ways, including in the slow cooker; either by itself or as a part of a recipe like you see here.

There are only a few ingredients in this slow cooker spaghetti squash casserole recipe. This healthy, low-carb alternative to spaghetti cooks in just a couple of hours time.

Other pizza recipes you might enjoy:

Pizza Chicken (Low-Carb)

Pizza Soup (Paleo, Whole30

There are only a few ingredients in this slow cooker spaghetti squash casserole recipe. This healthy, low-carb alternative to spaghetti cooks in just a couple of hours time.

Pizza Toppings

What I love most about this recipe is that when it comes to the toppings, the sky is the limit! I wanted a meaty pizza casserole so I used a combination of pre-cooked sausage (I pre-cooked the sausage so I could drain the grease) & pepperoni, approximately 6 ounces total. Want more meat? Use more! Cover it completely with meat if you want. Make it a ‘vegetarian’ pizza by using chopped vegetables like olives, bell peppers, onions, etc. Whatever you like on your pizza, you can use here as your topping for this pizza casserole.

There are only a few ingredients in this slow cooker spaghetti squash casserole recipe. This healthy, low-carb alternative to spaghetti cooks in just a couple of hours time.

I used a large 6-quart slow cooker or Instant Pot for this recipe.

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There are only a few ingredients in this slow cooker spaghetti squash casserole recipe. This healthy, low-carb alternative to spaghetti cooks in just a couple of hours time.

Slow Cooker Spaghetti Squash Pizza Casserole (Low-Carb)

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  • Total Time: 2 hours 5 mins
  • Yield: serves 4

Ingredients

Units Scale
  • 1 medium size spaghetti squash, COOKED (approx 2 lbs)
  • 15 ounces diced tomatoes
  • 2 cups mozzarella cheese, shredded
  • 1 1/2 tbsp Italian or pizza seasoning
  • 2 garlic cloves, minced
  • 1/2 tsp salt
  • 5 ounces topping of your choice (pepperoni, sausage, etc)

Instructions

  1. Shred spaghetti squash with fork and add to a large bowl along with diced tomatoes, salt, seasoning, and garlic.
  2. Spray slow cooker generously with cooking spray and add spaghetti squash mixture.
  3. Top with cheese and whatever additional toppings you’re using.
  4. Cook HIGH 1-2 hours or LOW 2-4.

Notes

Nutritional value calculated using 5 ounces of pepperoni.

  • Author: Fit SlowCooker Queen
  • Prep Time: 5 mins
  • Cook Time: 2 hours

Nutrition

  • Serving Size:
  • Calories: 296
  • Sugar: 8.4 g
  • Sodium: 1219.1 mg
  • Fat: 8.7 g
  • Saturated Fat: 1.9 g
  • Carbohydrates: 19.1 g
  • Fiber: 5.4 g
  • Protein: 37.2 g
  • Cholesterol: 75.7 mg

Spaghetti squash releases liquid when it cooks so don’t be surprised if the finished product is a little wet. If you have a pizza seasoning you like, feel free to swap that out for the Italian seasoning.

There are only a few ingredients in this slow cooker spaghetti squash casserole recipe. This healthy, low-carb alternative to spaghetti cooks in just a couple of hours time.

Looking for an Italian seasoning? Use mine:

italian seasoningI’ve used both a 3.5-quart and a 6-quart slow cooker when making this and they both work fine.

Slow Cooker Spaghetti Squash Casserole

There are only a few ingredients in this slow cooker spaghetti squash casserole recipe. This healthy, low-carb alternative to spaghetti cooks in just a couple of hours time.

There are only 5 ingredients in this slow cooker spaghetti squash casserole recipe. This healthy, low-carb alternative to spaghetti cooks in just a couple of hours time.

PIN FOR LATER

Slow Cooker Spaghetti Squash Casserole

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Slow Cooker Spaghetti Squash Pizza Casserole (Low Carb)
Recipe rating 5 Stars 4 Stars 3 Stars 2 Stars 1 Star

Greta Harris

Thursday 28th of October 2021

This was surprisingly good. We have been trying various recipes to use our bounty of spaghetti squash from the garden and this one is the best we've found hands down! We added green peppers, onion, a couple mushrooms and a bit of sausage for toppings. Thank you for this delightful, healthy meal!

Jodi

Monday 23rd of November 2020

CAn you make it in the instantpot?

Jessica

Wednesday 31st of January 2018

If I wanted to cook in the oven instead of in my crock pot how long would I cook it for?

Fit SlowCooker Queen

Wednesday 31st of January 2018

Bake at 375 for 20 min or until cheese melted. Here's an oven version for reference - https://fitslowcookerqueen.com/low-carb-spaghetti-squash-pizza-casserole/

Mer

Thursday 9th of November 2017

We tried this just now and it's so incredible!! Thanks SO MUCH for sharing this recipe, and I think we have a new family favourite! <3

Nancy Q.

Monday 20th of March 2017

This was absolutely delicious!! i made some minor modifications... I placed separate servings of the squash spaghetti in a muffin baking pan and baked for about 15 min to dry out some of the moisture. Then, I added the sauce, cheese, and turkey pepperoni and continued to baked until cheese melted. Finally, I broiled for about 2 minutes to get the golden brown tone on the cheese. This made up our healthy lunch servings for the week.

Fit SlowCooker Queen

Wednesday 11th of October 2017

Genius! I love that you made them into muffins. I never thought to bake them to dry out some of the moisture. Thank you so much for sharing. I'm so glad to hear you enjoyed the recipe!