Spaghetti Squash Gratin

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Spaghetti Squash Gratin is a delicious way to use the veggie that doubles as a pasta. This low carb, Keto side dish is so good you won’t know you are missing those carbs.

We use roasted spaghetti squash with greek yogurt, mozzarella and parmesan cheeses to make this carb friendly au gratin side dish.

spaghetti squash gratin on a plate with the corner of whole casserole at the top of the pic.

Why you will love Spaghetti Squash Au Gratin

Spaghetti Squash is the perfect substitution vegetable for your favorite pasta. It can even stand up to dishes that are normally meant for starches.

This Au Gratin recipe is filled with the flavors and textures you’d expect of any Au Gratin.

If you like this healthy substitution, be sure to check out our recipes for our BBQ PULLED PORK, SUGAR FREE BBQ RUB, LIGHT KEY LIME PIE and many more by using the search box and typing in “Healthy”.

You will be surprised at all of the things you won’t miss.

This is one of our favorite sides to have at Thanksgiving every year, even the grandbaby loves it!

Be sure and visit my friend Lindsey for even more help with the big day and check out her THANKSGIVING DINNER RECIPES.

How to Cut and cook Spaghetti Squash

We cover this over in our other post, HOW TO ROAST SPAGHETTI SQUASH but here is the short version.

One of the many challenges with the larger varieties of squash is cutting them to remove the seeds and cook.

With tough skin and large size, cutting them is not for the faint of heart.

Luckily, I have a trick that will help. Pop that squash in the microwave from 2-4 minutes. Carefully remove it ( it will be hot!) and it should slice easily.

Carefully cutting spaghetti squash on a wooden board into two halves.

We preheat our oven to 400 degrees and roast in two halves on a parchment lined sheet pan.

We remove the seeds and prep the squash as you will see below, turn them cut side down and cook. Easy as can be.

roasted squash on a foil lined pan with a fork to pull out squash.

How to Make Spaghetti Squash Gratin

This recipe is an easy one bowl mix and go! We keep it low carb and low fuss!

Ingredients

3 cups Spaghetti Squash cooked and separated
2 eggs
1 cup Mozzarella Cheese shredded
1/2 cup Plain Greek Yogurt
2 tbsp Minced Garlic
1/2 tsp dried thyme
Salt to taste
Pepper to taste
1/2 cup Parmesan Cheese grated

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Method

Preheat oven to 400.
In a large bowl, mix prepared, cooled squash with eggs, cheese and greek yogurt. Mixing well.
Season with salt, pepper, garlic and thyme. Mix well.
Pour in a lightly greased casserole dish. Top with parmesan cheese.
Bake for 30 minutes, until top is slightly browned. Allow to rest for 10 minutes.
Serve and enjoy!

pan of spaghetti squash fork and a white hand towel.

pouring squash gratin mixture in a greased casserole pan.

spaghetti squash gratin on a blue and white plate with the white casserole dish in the back ground.

Tips and Tricks

Is Spaghetti Squash Au Gratin Low Carb?

Spaghetti squash is a low glycemic vegetables and we do make it low carb by using low fat cheeses as well as plain Greek yogurt as a good source of lean protein.

What does Au Gratin mean?

Au gratin simply means covered with bread crumbs and cheese and browned on top. We substitute bread crumbs with the dry parmesan cheese to give the same texture.

Why is my spaghetti squash watery?

You probably over salted it. Too much salt can cause the squash to weep. We recommend just placing it in a strainer and allowing it to drain a bit before preparing further.

Is this Spaghetti Squash Casserole?

In a way, yes. A casserole is any dish cooked in one pan that is cooked slowly in the oven. And this is all of those things. No matter the name, Au Gratin or Casserole, the end result is still Delicious.

What goes well with Spaghetti Squash Gratin?

Lean Chicken, Fish or even Turkey are good choices. This is a great side dish to accompany almost any good protein. We have taken the liberty of suggesting some healthier options below.

A cooked yellow spaghetti squash on a pan with a fork full nearby.

Spaghetti Squash Au Gratin

If you make this recipe, be sure and post it to Facebook or Instagram and tag us. We love pictures of food. Also, if you pin this recipe, we would appreciate that when you make it, you use the Made It function in Pinterest too.

And as always, we would love it if you shared this recipe with your family and friends. Over to the side on this post and all of the others are handy dandy share buttons. We would sure be grateful if you shared the love!

A close-up of a cheesy casserole, ranked among the top 75 Thanksgiving side dish recipes, sits on a blue and white plate with a fork. The golden-brown layers look deliciously inviting. In the background, the rest of this holiday favorite rests in a white baking dish.

Spaghetti Squash Gratin

Spaghetti Squash Gratin is a delicious way to use the veggie that doubles as a pasta. This low carb, Keto side dish is so good you won't know you are missing those carbs.

Prep Time 40

Cook Time 30

Serving Size