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Close-up of cheesy Million Dollar Spaghetti Squash casserole.

Million Dollar Spaghetti Squash Casserole

If you’ve ever had classic Million Dollar Spaghetti (that cozy pasta recipe layered with meat sauce, a creamy cheese mixture, and lots of melty cheese), you’ll love this lighter twist. Instead of traditional pasta, we’re swapping in spaghetti squash for a baked spaghetti squash casserole that’s every bit as satisfying.
Prep Time20 minutes
Cook Time1 hour 10 minutes
Total Time1 hour 30 minutes
Makes 8 servings

Ingredients

  • 1 medium spaghetti squash
  • Salt and black pepper to taste
  • 1 Tablespoon olive oil
  • ½ cup yellow onion diced
  • 1 Tablespoon minced garlic
  • 2 cups shredded cooked chicken rotisserie or other
  • 1 ½ cups marinara sauce
  • 1 cup ricotta cheese
  • 1 teaspoon Italian seasoning
  • 1 cup shredded mozzarella cheese
  • ½ cup shredded parmesan cheeses
  • Fresh parsley or basil for garnish

Instructions

  • Preheat oven to 400°F. Line a baking sheet with parchment paper.
  • Cut 1 medium spaghetti squash in half lengthwise, scoop out seeds, and sprinkle with Salt and black pepper. Place cut-side down on the pan and roast for 20–30 minutes, until fork-tender.
  • Let cool 10 minutes, then use a fork to shred into strands. Wrap in a clean tea towel and squeeze dry.
  • In a skillet, heat 1 Tablespoon olive oil Add ½ cup yellow onion and 1 Tablespoon minced garlic; sauté 4 minutes. Stir in 2 cups shredded cooked chicken and heat through.
  • Add 1 ½ cups marinara sauce, 1 cup ricotta cheese, 1 teaspoon Italian seasoning, and a half cup of the cheese mixture (mozzarella + parmesan). Add cooked spaghetti squash. Stir until combined.
  • Spread evenly in a greased casserole pan. Top with remaining cheese.
  • Bake 30 minutes until hot and bubbly. Garnish with fresh parsley and serve in bowls.

Farm Girl Tips

Tip: Use a large, deeper skillet for this recipe. It fills up!
Make Ahead: You can roast the spaghetti squash 1–2 days in advance. Just shred, squeeze out excess moisture, and store in the fridge until ready to use.
Protein Options: Swap the chicken for lean ground beef, ground turkey, or ground chicken. All taste delicious with the cheese mixture and marinara sauce.
Storage: Leftovers will keep in the fridge for 3–4 days in an airtight container. Reheat in the oven or microwave until warmed through.
Freezing: Freeze in a freezer-safe dish for up to 3 months. Thaw overnight in the fridge and bake until hot and bubbly.

Nutrition

Serving: 1serving | Calories: 252kcal | Carbohydrates: 15g | Protein: 19g | Fat: 14g | Saturated Fat: 6g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 5g | Cholesterol: 59mg | Sodium: 489mg | Potassium: 427mg | Fiber: 3g | Sugar: 6g | Vitamin A: 649IU | Vitamin C: 7mg | Calcium: 238mg | Iron: 2mg
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