by 247tasty

If you are looking for another kid-friendly meal that is not only delicious, but grain-free and low-carb, then you have to try this spaghetti squash pizza casserole right away! All you need are three main ingredients and some optional add-ins like veggies, cheese, Italian seasoning, and more. This casserole is incredibly easy to throw together and ready in no time, making this perfect for even the busiest days.

My kids never like squash (I have the fussiest eaters!). But they always make an exception for this mouthwatering spaghetti squash pizza casserole. They fell in love with this the first time they tasted it. This has been part of our favorite menu rotation for years!

For the squash, I use my Instant Pot to prep it. You can also do this in the oven by slicing the squash in half lengthwise, removing the seeds, and baking for 45 to 50 minutes at 400 degrees, up-side-down. Once done, scrape the squash noodles. Although, I prefer doing this in my Instant Pot because it is easier.


mozzarella cheese
pasta sauce (use whatever kind you prefer)
pre-cooked spaghetti squash (I use Instant Pot)


sliced olives
pre-cooked meat
chopped veggies
chopped mushrooms
Parmesan cheese
Italian seasoning


Step 1: Prepare the oven. Preheat it to 350 degrees.

Step 2: In a 9 x 9-inch baking dish, place the pre-cooked squash. You can also use a bigger baking dish to accommodate enough pre-cooked squash. Then, stir in the pasta sauce and the optional add-ins (if desired). On top, sprinkle the cheese.

Step 3: Place in the preheated oven and bake for about 30 minutes or until the cheese has melted and bubbly and the squash is completely heated. You can turn the oven to broil for about 3 to 5 minutes if you want the cheese to be nice and crispy brown.

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