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Spaghetti Squash Pizza Casserole Recipe

4.7 from 86 reviews

This Spaghetti Squash Pizza Casserole is a delicious and healthy twist on traditional pizza. Using pre-cooked spaghetti squash as the base, combined with your favorite pasta sauce, cheese, and optional add-ins like meats and veggies, this casserole is baked to bubbly, cheesy perfection. It’s a satisfying, low-carb meal that’s simple to prepare and customizable to your taste.

Ingredients

Main Ingredients

  • Pre-cooked spaghetti squash (cooked in Instant Pot or preferred method)
  • Pasta sauce (any variety, amount to taste)
  • Mozzarella cheese (1 to 2 cups, shredded)

Optional Add-Ins

  • Pre-cooked meat (such as sausage or ground beef, 1 cup)
  • Chopped mushrooms (1/2 cup)
  • Sliced olives (1/4 cup)
  • Chopped veggies (bell peppers, onions, etc., 1/2 cup)
  • Italian seasoning (1 teaspoon)
  • Parmesan cheese (1/4 cup, grated)

Instructions

  1. Preheat Oven: Preheat your oven to 350°F (175°C) to prepare for baking the casserole.
  2. Prepare Squash in Baking Dish: Place the pre-cooked spaghetti squash into a 9×9 inch baking dish, or a larger dish if you have more squash.
  3. Add Sauce and Mix Add-ins: Stir in pasta sauce to coat the squash. If using any optional add-ins such as pre-cooked meat, chopped mushrooms, olives, or veggies, fold them into the mixture now along with Italian seasoning.
  4. Top with Cheese: Sprinkle a generous amount of shredded mozzarella cheese over the top. Optionally, add grated parmesan cheese for extra flavor.
  5. Bake: Bake the casserole in the preheated oven for about 30 minutes, or until the cheese on top is melted, bubbly, and the squash is heated through thoroughly.
  6. Optional Broil: For a crispy, browned cheese finish, switch the oven setting to broil for 3-5 minutes after baking. Watch carefully to prevent burning.

Notes

  • You can cook the spaghetti squash ahead of time in an Instant Pot, oven, or microwave to speed up preparation.
  • Adjust the amount of pasta sauce and cheese to your preference for sauciness and cheesiness.
  • Feel free to customize with your favorite vegetables or meats to adapt the casserole to your taste or diet.
  • Using low-fat cheese or reduced sodium pasta sauce can make this dish lighter and healthier.
  • Keep an eye on the casserole when broiling as cheese can brown quickly and burn.

Keywords: spaghetti squash casserole, pizza casserole, healthy casserole, baked casserole, low-carb casserole, veggie casserole, Italian casserole, easy dinner recipe