Skip to Content

Creamy Spinach Spaghetti Squash Casserole

As an Amazon Associate I earn from qualifying purchases.

Creamy Spinach Spaghetti Squash Casserole combines fresh “squaghetti” noodles with sautéed spinach, red bell pepper, and garlic plus three kinds of cheese to create a rich, yet delicate dish.

Spaghetti squash noodles can be substituted in many other pasta dishes or served topped with regular pasta sauce saving you loads of carbs — so what’s not to love?!

Not only that, Creamy Spinach Spaghetti Squash Casserole is a cheesy vegetarian, keto-friendly, low-carb, gluten-free casserole. That covers about all the bases!

Creamy Spinach & Spaghetti Squash Bake | Life, Love, and Good Food

Creamy Spinach Spaghetti Squash Casserole

Confession time. The first time I made this recipe was my very first experience cooking spaghetti squash. Truth! I’m not sure why it’s took me so long to try this vegetable, but let me tell you that this first time will not be my last.

Unlike other veggies that you spiralize to make noodles, once cooked the flesh of a spaghetti squash can be separated into spaghetti-like strands (or squaghetti as I like to call it) simply by scraping it out with a fork.

One three-pound squash will make enough squaghetti to equal around a pound of pasta noodles — a great alternative when you are watching your carb intake!

How to Cook a Spaghetti Squash

Here are two easy methods for cooking spaghetti squash — either way works in this recipe:

In the oven:

  1. Cut the spaghetti squash in half length-wise.
  2. Use a large spoon to scrape and scoop out the seeds.
  3. Lay the squash cut side down in a baking dish and add 1/2-cup of water.
  4. Bake at 400-degrees about 35 minutes, or until fork-tender.
  5. Remove the squash from the pan and allow it to cool enough to handle.
  6. Use a fork to gently scrape all the flesh away from the rind/peel.

In the instant pot:

  1. Cut the spaghetti squash in half length-wise.
  2. Use a large spoon to scrape and scoop out the seeds.
  3. Add one inch of water to the Instant Pot and insert the steamer basket.
  4. Lay the squash in the basket (not in the water) and lock the lid and turn the valve to vent.
  5. Pressure cook for 5 minutes. When the pot beeps, hit cancel.
  6. Quick release the steam by carefully opening the vent.
  7. Remove squash and allow it to cool enough to handle.
  8. Use a fork to gently scrape all the flesh away from the rind/peel.

How to Make Creamy Spinach Spaghetti Casserole

This keto-friendly casserole is really simple to put together once the spaghetti squash has been cooked.

Spaghetti squash on a wooden table, with fork and frying pan
  1. Cook spaghetti squash and scrape out the flesh.
  2. Sauté diced onions and red bell pepper until tender, then add minced garlic and cook another minute until fragrant.
  3. Toss in fresh spinach and cook until wilted.
  4. Add a block of softened cream cheese and stir until melted.
  5. Gently stir in the spaghetti squash, then place the mixture in a lightly greased casserole dish.
  6. Top with mozzarella and parmesan cheese and bake until hot, bubbly, and the cheese has a golden crust.

More delicious vegetable recipes

Creamy Spinach & Spaghetti Squash Bake | Life, Love, and Good Food

To make this recipe you may need…

The following are affiliate links. We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliate sites.

Not totally necessary, but a pressure cooker is an easy way to cook spaghetti squash. I am thrilled with my new Mealthy MultiPot! I don’t know why I waited so long to get it and now can’t wait to experiment with all kinds of recipes. Not only that, I have a special coupon code just for my readers for a $10.00 savings off the purchase of $59.95 or greater. Just enter LIFELOVEANDGOODFOOD at checkout to get the discount!

What else is new? Check out my Life, Love, and Good Food Store on Amazon! Thanks so much for being a part of our community!

Creamy Spinach & Spaghetti Squash Bake | Life, Love, and Good Food

Creamy Spinach Spaghetti Squash Casserole Recipe

After removing the casserole from the oven, allow it to set for at least 15 minutes if you’d like to cut it into squares to serve like lasagna. To reheat the casserole, place a serving on a microwave-safe plate and heat for 1-1/2 minutes in the microwave.

Please share!

Your shares are how this site grows and I appreciate each one. Do you know someone who would enjoy this recipe? I’d love it if you would share it on Facebook or on your favorite Pinterest board!

Last Updated: 22 Oct 2019
Yield: 8 servings

Creamy Spinach Spaghetti Squash Casserole

A serving of spinach spaghetti squash casserole on a blue plate with a fork

Creamy Spinach & Spaghetti Squash Bake with sautéed spinach, red pepper, garlic, and three kinds of cheese. Keto-friendly recipe, too!

Prep Time 30 minutes
Cook Time 30 minutes
Total Time 1 hour

Ingredients

  • 1 3-pound spaghetti squash
  • 1/2 cup water
  • 1 teaspoon olive oil
  • 4 cups spinach, chopped
  • 1/2 red bell pepper, diced
  • 1 clove garlic, minced
  • dash of nutmeg
  • 1 teaspoon salt
  • 1/2 teaspoon pepper
  • 8 oz. cream cheese, softened
  • 1 cup mozzarella cheese
  • 1/4 cup parmesan cheese

Instructions

  1. Preheat oven to 400 degrees.
  2. Slice spaghetti squash in half length-wise. Scoop out seeds and place cut side down in a glass baking dish. Pour 1/2 cup water into dish and bake for about 30-35 minutes. With a fork gently shred the pulp from the inside of the squash and set aside.Reduce oven heat to 375 degrees.
  3. On top of stove, heat olive oil in a large skillet over medium heat. Add spinach and red bell pepper and sauté just until spinach is wilted. Add garlic and spices and cook until fragrant, about 1 minute.
  4. Gently stir in cream cheese until melted. Add the spaghetti squash and stir until combined.
  5. Pour mixture into a casserole dish that is lightly coated with cooking spray. Top with the mozzarella and parmesan cheese. Bake at 375 degrees for 30 minutes, or until bubbly and cheese is lightly browned.

Notes

  • After removing the casserole from the oven, allow it to set for at least 15 minutes if you'd like to cut it into squares to serve like lasagna.
  • To reheat the casserole, place a serving on a microwave-safe plate and heat for 1-1/2 minutes in the microwave.


To cook the spaghetti squash in an instant pot:

  1. Cut the spaghetti squash in half length-wise.
  2. Use a large spoon to scrape and scoop out the seeds.
  3. Add one inch of water to the Instant Pot and insert the steamer basket.
  4. Lay the squash in the basket (not in the water) and lock the lid and turn the valve to vent.
  5. Pressure cook for 5 minutes. When the pot beeps, hit cancel.
  6. Quick release the steam by carefully opening the vent.
  7. Remove squash and allow it to cool enough to handle.
  8. Use a fork to gently scrape all the flesh away from the rind/peel.

Recommended Products

As an Amazon Associate and member of other affiliate programs, I earn from qualifying purchases.

Nutrition Information:

Yield:

8

Serving Size:

1

Amount Per Serving: Calories: 229Total Fat: 15gSaturated Fat: 8gTrans Fat: 0gUnsaturated Fat: 5gCholesterol: 42mgSodium: 592mgCarbohydrates: 17gFiber: 5gSugar: 6gProtein: 10g

Did you make this recipe?

Please leave a comment on the blog or share a photo on Instagram

ABOUT SHEILA
Sheila Thigpen, author of Easy Chicken Cookbook and The 5-Ingredient Fresh and Easy Cookbook, is a recipe developer, food photographer, and food writer. She spent 20+ years as a business manager in the publishing industry before she retired in 2018 to focus on her passions — cooking, photography, and writing. Living near the beautiful Smoky Mountains, Sheila and her husband have two adult daughters and two fine sons-in-law, are active in their church, love to travel, and have a precious little granddaughter who has stolen their hearts. Follow Sheila on YouTubePinterestInstagramFacebook, and Twitter!

A close up of a hamburger sitting on top of a wooden table
Previous
10 Best Gifts for Grill Masters
baked brie on a slate platter with apple slices, molasses, and walnuts with the cheese ozzing
Next
Baked Brie Appetizer with Apples and Molasses

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Maryann

Saturday 11th of July 2020

This was amazing!! Instead of plain cream cheese I used onion chive cream cheese.

Jackson and Belle’s G

Monday 22nd of June 2020

My family really liked this. I discovered too late that we were out of spinach. So I chopped up one fresh eggplant and sautéed it with the other veggies. I then squished the eggplant up, because my daughter is not a fan of eggplant. I also added one seeded, diced jalapeño (supposed to be a mild version) to the sautéing veggies. I mixed about 2/3 of a cup of cheddar into the casserole and then topped with grated cheddar and grated Parmesan. I baked it for 30 minutes in 350. My family loved it, and my daughter never noticed the eggplant! Lol. I really didn’t taste the garlic or jalapeño in the dish. Next time, I will add 2 cloves of minced garlic and two minced, seeded jalepenos. I will also 3-4 dashes if Tobasco chipotle hot sauce. Great recipe!!!

Christina

Monday 30th of March 2020

Curious if you've tried freezing this. It made a whole lot of leftovers, and I don't know if I can eat it every day for the next week!

Sheila Thigpen

Monday 30th of March 2020

Christina, I have not tried freezing the leftovers, but I would think that should work. Cool completely and seal the leftovers tightly. I'd suggest thawing in the refrigerator before reheating, too.

Jamie

Tuesday 11th of February 2020

Just cooked this up! Added 97% fat free turkey! I’m doing weight watchers and this came out to five points with the ingredients that I used! Can’t wait to dig in, thank you so much for an awesome recipe!!

Stephanie

Sunday 19th of May 2019

This is wonderful. I added Italian turkey sausage and doubled the recipe and I will make it a million times over.

This site uses Akismet to reduce spam. Learn how your comment data is processed.

shares