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Home » Dinner

Spaghetti Squash Casserole

November 29, 2021 by Jordan Smith 11 Comments

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This is a pinterest pin for Spaghetti Squash Casserole. There is a casserole dish with spaghetti squash, peppers, ground beef and is topped with cheese.
This is a pinterest pin for Spaghetti Squash Casserole. There is a casserole dish with spaghetti squash, peppers, ground beef and is topped with cheese.
This is a pinterest pin for Spaghetti Squash Casserole. There is a casserole dish with spaghetti squash, peppers, ground beef and is topped with cheese.
This is a pinterest pin for Spaghetti Squash Casserole. There is a casserole dish with spaghetti squash, peppers, ground beef and is topped with cheese.
This is a pinterest pin for Spaghetti Squash Casserole. There is a casserole dish with spaghetti squash, peppers, ground beef and is topped with cheese.
This is a pinterest pin for Spaghetti Squash Casserole. There is a casserole dish with spaghetti squash, peppers, ground beef and is topped with cheese.
This is a pinterest pin for Spaghetti Squash Casserole. There is a casserole dish with spaghetti squash, peppers, ground beef and is topped with cheese.
This is a pinterest pin for Spaghetti Squash Casserole. There is a casserole dish with spaghetti squash, peppers, ground beef and is topped with cheese.
This is a pinterest pin for Spaghetti Squash Casserole. There is a casserole dish with spaghetti squash, peppers, ground beef and is topped with cheese.
This is a pinterest pin for Spaghetti Squash Casserole. There is a casserole dish with spaghetti squash, peppers, ground beef and is topped with cheese.

Easy, satisfying, and good for your body and soul: try this awesome spaghetti squash casserole!

This is spaghetti squash casserole. There is melted cheese and red pepper flakes on top of diced peppers and onions with ground turkey.
Jump to Recipe

Spaghetti squash casserole

Ah, the incredible, edible spaghetti squash. Like coffee cake, it is not the first word that describes what it actually is, but the second: it is squash. Unlike coffee cake, the first word still says something about the physical nature of the thing: when roasted and picked apart, the meat of the squash becomes this stranded, fibrous stuff that’s kind of like spaghetti.

This makes it really great for things that spaghetti is great for, and sometimes even better because the rind is a built-in container, as in my recipe for spaghetti squash boats.

Sometimes, you have to step up your squash game and jump from boat to casserole dish—as a newly-returned Midwesterner, this is practically my duty. The results are delicious, I assure you.

Spaghetti squash casserole recipe

This casserole is a one-stop shop for nutritious goodness. You’ve got the protein, the fiber, the flavor—everything you need to succeed and be a hit with your friends and family (or just yourself! I don’t know your situation)!

This casserole stands out in the wide world of casseroles because it fills you up without making you feel like you drank out of a cement truck afterwards. It keeps you fuller longer (that’s that squash!), which is good because you’ll want this to last all week long.

Spaghetti squash casserole ingredients

Here’s what we’ve got going on for ingredients:

You’re going to start be microwaving the squash for a few minutes before you actually cut into it. It’s going to make the dreaded slicing-in-half step a pleasant experience.

  • spaghetti squash
  • ground turkey (93% lean)
  • mozzarella cheese (shredded)
  • bell peppers
  • onion
  • diced tomatoes
  • garlic
  • olive oil
  • red pepper flakes
  • onion powder
  • salt and pepper

Everything’s going to end up in the same dish, too, which is pretty convenient.

This is a skillet of some of the ingredients for spaghetti squash casserole. There are diced bell peppers and onion on the right side of the skillet. The left side of the skillet is a chunk of raw ground turkey.

How to make spaghetti squash casserole

Some are intimidated by mastering the whole spaghetti squash prep situation, but I promise you it’s a breeze, especially if you use the technique this recipe recommends.

Here’s the whole thing:

  • Start by preparing the spaghetti squash. Use a fork to poke a few holes in the spaghetti squash where you will cut it in half (lengthwise). Microwave the entire squash for about 5 minutes. Use a large, sharp knife to cut the squash in half. Use a spoon to scoop out the seeds. Spray each half of the spaghetti squash with cooking oil (or drizzle with olive oil). Sprinkle each side with salt and pepper. Place the spaghetti squash halves face side down on a greased baking sheet. Bake at 400 for 30-40 mins until tender and lightly brown. Take the squash out of the oven, let cool, and use forks to shred the squash into strands. Place the shredded squash in a bowl and set aside.
  • Heat a large skillet over medium-high heat. Add olive oil.
  • Add the pepper, onion, garlic, and ground turkey to the skillet. Sprinkle with seasonings. Cook for about 10 minutes, until the meat is no longer pink.
  • Add the can of tomatoes to the skillet. Cook for another 3-5 minutes.
  • Scoop in the spaghetti squash and ½ of the cheese. Mix well.
  • Use a slotted spoon or tongs to add the casserole mixture to a greased casserole dish. (The slotted spoon is to leave behind the juices. Adding some of the juice is no big deal.)
  • Sprinkle remaining cheese on top of the casserole.
  • Bake at 350 for 20 minutes or the cheese is melted.
  • Top with additional red pepper flakes for a kick. Enjoy!
This is a dish of spaghetti squash casserole. There is dish filled with melted cheese on top of peppers, onions, and ground turkey.

How to reheat this casserole

The beauty of this spaghetti squash casserole is that you can reheat the whole casserole dish at once (in the oven) OR just go ahead and take out single servings at a time and pop them in the microwave.

When reheating in the oven, you might cover it in aluminum foil to prevent the dish from drying out.

This is a skillet of ingredients for spaghetti squash casserole. The skillet is filled with diced peppers, onions, and cooked ground turkey.

Is spaghetti squash healthy?

Nothing is automatically going to be healthy on its own, but spaghetti squash itself is pretty great from a nutritional standpoint. Low in fat and carbs, it’s a great replacement for pasta in many contexts.

As a casserole, this dish can absolutely be part of a thoughtful nutrition plan and help keep you fueled in your day-to-day.

This is a casserole dish with the uncooked spaghetti squash casserole. There are diced peppers, onions, tomatoes, and ground turkey covered in shredded white mozzarella cheese.

How do you keep squash casserole from getting watery?

Because of the liquid contained in spaghetti squash, some people run into issues with it being a bit watery. In the context of this casserole, I don’t notice that being so much of a problem—likely because other ingredients are absorbing the moisture!

That said, I’ve heard that salting it and letting it sit for a while can draw out some of the excess moisture. To be honest, I haven’t tried that for this recipe because I haven’t needed to do it to achieve great results. If you give that technique a go, let me know how it works for you!

Looking for something similar?

Why not try one of these Jordo’s World staples:

  • Buffalo Chicken Pasta Bake
  • Healthy Chicken Enchiladas
  • Turkey Pasta Primavera
This is a dish of spaghetti squash casserole. There is dish filled with melted cheese on top of peppers, onions, and ground turkey.
This is spaghetti squash casserole. There is melted cheese and red pepper flakes on top of diced peppers and onions with ground turkey.
Print Recipe
4.86 from 7 votes

Spaghetti Squash Casserole

Easy, satisfying, and good for your body and soul: try this awesome spaghetti squash casserole!
Prep Time1 hour hr
Cook Time20 minutes mins
Course: Main Course
Cuisine: American
Keyword: casserole, spaghetti squash
Servings: 6
Calories: 274kcal
Author: Jordan Smith

Equipment

  • skillet
  • casserole dish
  • oven

Ingredients

  • 1 spaghetti squash
  • 1 lb ground turkey 93% lean
  • 1 cup mozzarella cheese shredded
  • 2 bell peppers diced
  • 1 medium onion diced
  • 1 can diced tomatoes fire roasted or italian
  • 2 cloves garlic minced
  • 2 tablespoon olive oil
  • 1 teaspoon red pepper flakes
  • 1 teaspoon onion powder
  • salt and pepper pinch

Instructions

  • Start by preparing the spaghetti squash. Use a fork to poke a few holes in the spaghetti squash where you will cut the it in half (length wise). Microwave the entire squash for about 5 minutes. Use a large, sharp knife to cut the squash in half. Use a spoon to scoop out the seeds. Spray each half of the spaghetti squash with cooking oil (or drizzle with olive oil). Sprinkle each side with salt and pepper. Place the spaghetti squash halves face side down on a greased baking sheet. Bake at 400 for 30-40 mins until tender and lightly brown. Take the squash out of the oven, let cool, and use forks to shred the squash into strands. Place the shredded squash in a bowl and set aside.
  • Heat a large skillet over medium-high heat. Add olive oil.
  • Add the pepper, onion, garlic, and ground turkey to the skillet. Sprinkle with seasonings. Cook for about 10 minutes, until the meat is no longer pink.
    This is a skillet of some of the ingredients for spaghetti squash casserole. There are diced bell peppers and onion on the right side of the skillet. The left side of the skillet is a chunk of raw ground turkey.
  • Add the can of tomatoes to the skillet. Cook for another 3-5 minutes.
    This is a skillet of ingredients for spaghetti squash casserole. The skillet is filled with diced peppers, onions, and cooked ground turkey.
  • Scoop in the spaghetti squash and ½ of the cheese. Mix well.
  • Use a slotted spoon or tongs to add the casserole mixture to a greased casserole dish. (The slotted spoon is to leave behind the juices. Adding some of the juice is no big deal.)
    This is a casserole dish with the uncooked spaghetti squash casserole. There are diced peppers, onions, tomatoes, and ground turkey covered in shredded white mozzarella cheese.
  • Sprinkle remaining cheese on top of the casserole.
  • Bake at 350 for 20 minutes or the cheese is melted.
    This is a dish of spaghetti squash casserole. There is dish filled with melted cheese on top of peppers, onions, and ground turkey.
  • Top with additional red pepper flakes for a kick. Enjoy!
    This is spaghetti squash casserole. There is melted cheese and red pepper flakes on top of diced peppers and onions with ground turkey.

Nutrition

Calories: 274kcal | Carbohydrates: 20g | Protein: 22g | Fat: 15g

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Comments

  1. Hannah says

    November 29, 2021 at 4:59 pm

    5 stars
    Don't sleep on spaghetti squash if you have never tried it before! This casserole was the perfect meal prep option and was so full of flavor- hello red pepper flakes meets fire roasted tomatoes and bell peppers!! This will definitely become a fall staple for me!

    Reply
  2. Sharon says

    November 29, 2021 at 9:02 pm

    This was such a good reminder for me to make something with spaghetti squash. If you have a Instant Pot you can actually save time on this recipe by cooking the spaghetti squash in it. It only takes 7-minutes of actual cooking time, then 5-minutes of natural pressure release time. Not sure how long it takes for the IP to come to pressure. But, while the IP is doing it's thing with the squash, you can be cooking the meat and veggies.

    Reply
  3. Angela says

    December 03, 2021 at 1:27 pm

    5 stars
    Great way to use up the spaghetti squash I had gotten! The only things I modified was using just regular diced tomatoes (that's all I had), and increasing the cheese. 2/3 of my kiddos liked it, so that's a win in my book! I'm eating the leftovers now for lunch 🙂

    Reply
  4. Liv says

    December 05, 2021 at 7:40 am

    5 stars
    Oh my goodness!!! This casserole was WAY better than I ever expected! It will definitely be put on a regular rotation. Extremely flavorful!

    Reply
  5. Sharon says

    December 05, 2021 at 12:48 pm

    5 stars
    This was easy and delicious! It hit the spot with needing warm comfort food but without all the calories that come from
    Comfort food.

    Reply
  6. Jana Parrigon says

    December 06, 2021 at 7:41 pm

    5 stars
    This was such a great meal. The flavor is robust, and it came together really easily. I cooked the spaghetti squash early in the day, so I just threw it in while adding the ingredients. This was so yummy!

    Reply
  7. Jasmyn says

    June 17, 2022 at 7:49 am

    5 stars
    This is a favorite to make ahead and have for lunch all week. A nice filling portion for the macros.

    Reply
  8. Treva says

    June 17, 2022 at 8:29 am

    5 stars
    I have made this several times and it’s delicious! I have 5 kiddos and they all take a second serving!

    Reply
  9. Jasmyn says

    June 19, 2022 at 9:13 pm

    5 stars
    This is a favorite to make ahead and have all week I like to warm it up over a bed of spinach!

    Reply
  10. Danielle Frame says

    January 11, 2023 at 6:23 pm

    4 stars
    This was a great recipe! Filling and I was able to clear stuff from the frig 🙂

    Reply
  11. Ashley says

    November 11, 2024 at 6:54 pm

    5 stars
    Made this for meal prep lunches this week and it turned out great. Easy and delicious

    Reply
4.86 from 7 votes (3 ratings without comment)

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Hi, I'm Jordo!

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