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Broccoli Cheddar Spaghetti Squash Casserole

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  • Author: Jessica
  • Prep Time: 60 minutes
  • Cook Time: 60 minutes
  • Total Time: 2 hours
  • Yield: 10 servings
  • Category: Main Course
  • Method: Baking
  • Cuisine: American

Description

This Broccoli Cheddar Spaghetti Squash Casserole transforms your favorite cozy soup flavors into a hearty, cheesy, and satisfying baked dish. Loaded with chicken, broccoli, and cheddar, it’s a healthy comfort meal that’s great for family dinners or meal prep.


Ingredients

  • 1 spaghetti squash (22.5 lb), cooked and shredded (about 4 cups)
  • 4 cups cooked chicken, diced or shredded (e.g. rotisserie)
  • 2 tbsp avocado oil
  • 1/2 large yellow onion, diced
  • 5 cups broccoli, roughly chopped
  • 4 cloves garlic, minced
  • 1 cup plain Greek yogurt
  • 1.5 cups cheddar cheese, divided
  • 2 tsp salt
  • 1/2 tsp pepper
  • 2 tsp garlic powder
  • 2 tsp onion powder
  • 2 eggs, whisked


Instructions

  1. Preheat oven to 400°F (200°C) and grease a 9×13-inch baking dish.
  2. Prepare spaghetti squash: roast, shred with a fork, and set aside. Also prepare cooked chicken (rotisserie recommended for ease).
  3. Heat avocado oil in a large pan over medium-high heat. Add diced onion and cook for 1 minute, then add chopped broccoli. Sauté for 6–7 minutes until just tender. Add minced garlic in the final minute of cooking. Remove from heat.
  4. In a large mixing bowl, combine cooked spaghetti squash, chicken, broccoli mixture, Greek yogurt, 1 cup cheddar cheese, salt, pepper, garlic powder, and onion powder. Mix until well combined.
  5. Stir in whisked eggs until fully incorporated.
  6. Transfer mixture into the prepared baking dish and smooth into an even layer. Top with remaining 0.5 cup of cheddar cheese.
  7. Bake uncovered for 45–50 minutes or until the casserole is set in the center and bubbling.
  8. Let cool for at least 15 minutes before serving for best texture.

Notes

  • Rotisserie chicken saves time and adds flavor, but any pre-cooked chicken works.
  • Letting the casserole rest after baking helps it firm up for cleaner slices.
  • Swap cheddar for a cheese blend like mozzarella or Monterey Jack for a twist.
  • To make this vegetarian, omit the chicken or replace with white beans or chickpeas.

Nutrition

  • Serving Size: 1/10 of recipe
  • Calories: 270
  • Sugar: 4g
  • Sodium: 580mg
  • Fat: 14g
  • Saturated Fat: 6g
  • Unsaturated Fat: 6g
  • Trans Fat: 0g
  • Carbohydrates: 9g
  • Fiber: 2g
  • Protein: 25g
  • Cholesterol: 105mg