Go ahead, get your squash on, and make a big old pan of this filling and flavorful casserole! It’s extra garlicky and creamy tasting without the cheese so it’s Whole30 & Paleo friendly.

This was a huge hit in my house. My picky toddler ate three helpings and even the broccoli (cue mama happy dance). Will definitely be in the rotation. I used defrosted broccoli florets and added onion while cooking the sausage.

Taylor

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Horizontal image of spaghetti squash casserole in a large dish with serving spoon.

Tips from an expert cook

The main tip here is to not overcook the squash. It will get watery in the oven when you combine everything if you do.

Additionally, our preference is tender-crisp broccoli so expect it to come out al dente. If you’d like it more cooked, you can add it with the ingredients in the pan when you are sautéing the mushrooms and garlic to make the sauce to begin to soften it.

Looking for more spaghetti squash recipes? Check out this roundup of 10 Cozy Spaghetti Squash Recipes!

Overhead vertical image of casserole dish filled with creamy garlic spaghetti squash and a serving spoon.

Cutting spaghetti squash

The hardest part of the prep work is really cutting the spaghetti squash! Seriously, isn’t that the worst part? Did you know that if you ask someone working in the produce section at the grocery store, they will cut it in half for you?! Yep, there’s a time saving (and potential ER trip saving) tip for you right there!

Close up vertical overhead image of spaghetti squash casserole in dish with serving spoon.

Some Other Casseroles To Try

If you love this one, a couple other family favorites of ours are our Spaghetti Pizza Casserole and Creamy Bacon Ranch Chicken Casserole!

We hope you love this recipe as much as we do!

Don’t forget to leave a quick star rating and review below, we read every comment and truly appreciate your feedback. Also, be sure to browse the rest of our easy, delicious recipes to find some other favorites too!

4.40 from 542 ratings
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Creamy Garlic Spaghetti Squash Casserole (Paleo, Whole30, GF + Dairy-Free)

This creamy garlic spaghetti squash casserole is so saucy and delicious! It has a creamy dairy-free sauce packed with garlicky goodness. Only 8 ingredients and it's ready in about an hour.

Ingredients

Instructions
 

  • Preheat oven to 400° Fahrenheit.
  • Slice the spaghetti squash lengthwise and scoop out the seeds. Place the two halves face-down on a baking sheet and bake for 25 minutes.
    1 medium spaghetti squash
  • While the squash is cooking, get the sausage going. Heat a large pan over medium heat and add in the sausage. Break it into pieces with a spatula and cook, stirring occasionally, until browned and cooked through, about 8 minutes. Remove from pan and set aside. Reserve at least 1 tbsp of fat in the pan for the sauce you’ll make later.
    1 lb ground Italian sausage
  • Remove squash from oven after 25 minutes and set aside to cool. Keep the oven on at 400°.
  • While the squash is cooling, prepare the creamy garlic sauce. Whisk together coconut milk and arrowroot flour in a bowl or jar and set aside.
    16 oz coconut milk, 1/4 cup arrowroot flour
  • Heat the same pan you cooked the sausage in over medium heat. Once hot, add mushrooms and cook until they begin to soften, about 2 minutes. Add in minced garlic and mix well with the mushrooms, about 1-2 minutes, until fragrant.
    2 cups mushrooms, sliced, 2 tbsp minced garlic
  • Next, whisk up the coconut milk mixture again and add to pan, stirring constantly for 2 minutes. The sauce will bubble and thicken, keep stirring to prevent burning. After 2 minutes turn heat off and stir in salt and pepper. 
    Salt and pepper
  • Now, put it all together. With a fork, scrape out the spaghetti squash “noodles” into a medium casserole dish. Add the cooked sausage, broccoli, and creamy garlic sauce. Mix everything together well.
    4 cups broccoli florets
  • Place back in the oven to bake for 15 more minutes. Remove and serve.

Last Step:

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