Spaghetti Squash Pizza Casserole Recipe

Introduction

Spaghetti Squash Pizza Casserole is a delightful, low-carb twist on your favorite pizza flavors. This easy casserole combines tender spaghetti squash with savory sauce, cheese, and optional toppings for a comforting meal that’s perfect for weeknights.

Ingredients

• Pre-cooked spaghetti squash (preferably cooked in the Instant Pot)
• Pasta sauce (any kind you like)
• Mozzarella cheese
• Optional add-ins:
  • Pre-cooked meat
  • Chopped mushrooms
  • Sliced olives
  • Chopped veggies
  • Italian seasoning
  • Parmesan cheese

Instructions

1. Step 1: Preheat your oven to 350°F (175°C).
2. Step 2: Place the pre-cooked spaghetti squash into a 9×9 inch baking dish, or larger if you have more squash.
3. Step 3: Stir in the pasta sauce along with any optional add-ins you choose to include.
4. Step 4: Sprinkle mozzarella cheese and Parmesan cheese (if using) evenly over the top.
5. Step 5: Bake the casserole for about 30 minutes, until the cheese is melted, bubbly, and the squash is heated through.
6. Step 6: For a crispy, browned cheese topping, switch the oven to broil for 3-5 minutes—watch closely to prevent burning.

Tips & Variations

• Use your favorite pasta sauce—spicy arrabbiata or classic marinara both work beautifully.
• Customize with your preferred add-ins like pepperoni, bell peppers, or fresh basil for extra flavor.
• For a richer taste, mix in some ricotta or cream cheese before baking.
• If you prefer a gluten-free and low-carb meal, be sure to use a sauce free from added sugars.

Storage

Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat in the oven at 350°F until warmed through, or microwave for a quicker option—though the oven will keep the topping crispier.

How to Serve

Serve this delicious recipe with your favorite sides.

FAQs

Can I cook the spaghetti squash without an Instant Pot?

Yes, you can bake the spaghetti squash in the oven at 400°F for about 40-50 minutes or microwave it until tender. The Instant Pot just speeds up the process.

Can I make this casserole ahead of time?

Absolutely! Assemble the casserole and refrigerate it for up to 24 hours before baking. You may need to add a few extra minutes to the baking time if it’s chilled.

Spaghetti Squash Pizza Casserole Recipe

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4.8 from 127 reviews

This Spaghetti Squash Pizza Casserole is a delicious and healthy twist on traditional pizza. Featuring pre-cooked spaghetti squash combined with your favorite pasta sauce, melted mozzarella, and optional add-ins like meats, vegetables, and Italian seasoning, this casserole is baked to bubbly perfection for a comforting, low-carb meal that the whole family will enjoy.

• Author: Ruby
• Prep Time: 15 minutes
• Cook Time: 30 minutes
• Total Time: 45 minutes
• Yield: 4 servings 1x
• Category: Main Dish
• Method: Baking
• Cuisine: Italian-American
• Diet: Gluten Free

Ingredients

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Main Ingredients

• 1 medium spaghetti squash, pre-cooked (preferably in Instant Pot)
• 1 to 1 1/2 cups pasta sauce (your favorite kind)
• 1 to 1 1/2 cups shredded mozzarella cheese

Optional Add-Ins

• 1 cup pre-cooked meat (Italian sausage, ground beef, or chicken)
• 1/2 cup chopped mushrooms
• 1/4 cup sliced olives
• 1/2 cup chopped vegetables (bell peppers, onions, etc.)
• 1 teaspoon Italian seasoning
• 1/4 cup grated Parmesan cheese

Instructions

1. Preheat oven: Preheat your oven to 350°F (175°C) to prepare for baking the casserole.
2. Prepare the baking dish: Place the pre-cooked spaghetti squash into a 9×9 inch baking dish. If you have more squash, use a larger dish to accommodate the quantity.
3. Combine ingredients: Stir in the pasta sauce into the spaghetti squash thoroughly. Add your desired optional add-ins such as pre-cooked meats, mushrooms, olives, vegetables, and Italian seasoning to enhance the flavor and texture.
4. Add cheeses: Sprinkle the shredded mozzarella cheese evenly over the mixture. Optionally, you can also add grated Parmesan cheese on top for extra flavor.
5. Bake the casserole: Place the baking dish in the oven and bake for about 30 minutes, or until the cheese is melted, bubbly, and the casserole is heated through completely.
6. Broil for crispy cheese (optional): For a golden-brown, crispy cheese topping, switch your oven to the broil setting and broil the casserole for 3 to 5 minutes. Keep a close eye on it to prevent burning.
7. Serve: Remove the casserole from the oven, let it cool slightly, then serve warm as a tasty and wholesome meal.

Notes

• You can cook the spaghetti squash ahead of time in an Instant Pot, oven, or microwave before assembling the casserole.
• Feel free to customize the add-ins based on your preference or what you have on hand; Italian seasoning adds a great flavor dimension.
• Broiling the cheese at the end is optional but recommended for a crispy, golden topping.
• This casserole keeps well in the refrigerator for 3-4 days and reheats nicely.
• For a gluten-free version, confirm your pasta sauce does not contain gluten-containing additives.

Keywords: spaghetti squash casserole, low carb pizza casserole, baked spaghetti squash, healthy pizza casserole, gluten free casserole