Recipes Side Dish Casseroles Squash Casserole Recipes Cheesy Spaghetti Squash Casserole 4.5 (8) 8 Reviews 3 Photos I had a recipe for a 4-cheese baked spaghetti squash that I really liked, but it was hard to eat. It was baked in the shell of the squash, and then mixed together after baking. I wanted to try it as a casserole, and after a few tries, this is what I came up with. Submitted by Shasta Duplantis Updated on November 9, 2023 Save Rate Print Share Close Add Photo 3 Prep Time: 35 mins Cook Time: 1 hr 15 mins Total Time: 1 hr 50 mins Servings: 10 Yield: 1 9x13-inch casserole Jump to Nutrition Facts Cook Mode (Keep screen awake) Ingredients 1 (3 pound) spaghetti squash, halved and seeded 2 tablespoons olive oil, divided, or as needed ¼ teaspoon garlic pepper seasoning 1 (16 ounce) package sliced fresh mushrooms 1 large onion, diced 1 medium jalapeno pepper, seeded and diced 1 bulb garlic, cloves peeled and minced 1 pound ground pork sausage 1 ½ teaspoons fennel seeds salt and ground black pepper to taste 2 tablespoons chicken soup base (such as Better than Bouillon) 1 ½ teaspoons dried oregano 1 ½ teaspoons ground thyme 1 ½ teaspoons dried basil 1 ½ cups grated Parmesan cheese 1 ½ cups shredded Cheddar cheese 1 ½ cups shredded mozzarella cheese nonstick cooking spray 1 ½ cups whipping cream Directions Preheat the oven to 350 degrees F (175 degrees C). Brush the squash flesh with 1 tablespoon olive oil and sprinkle 1/8 teaspoon garlic-pepper over top; rub the edges and insides to make sure it's distributed evenly. Place on a baking sheet. Bake in the preheated oven until tender when pierced with a fork, 45 to 60 minutes. Meanwhile, heat 1 tablespoon olive oil in a large cast iron pan over low heat. Add mushrooms, onion, and jalapeno and cook, stirring occasionally, for 30 minutes. Add garlic and cook for about 10 more minutes. Move everything to the outside edges of the pan; add sausage, fennel seeds, salt, and pepper to the center. Cook and stir until pork is browned, crumbly, and no longer pink, about 10 minutes. Remove squash from the oven and set aside to cool a bit. Leave the oven on. Mix chicken base, oregano, thyme, and basil together in a large bowl. Add Parmesan cheese and mix thoroughly. Add Cheddar and mozzarella and mix until well combined; it may be a little clumpy, but as long as it's only small clumps, that's okay. Shred squash flesh onto a sheet pan; use an oven mitt to hold it if it's still too hot. Toss with remaining garlic-pepper and season with salt and pepper if you want to. (Just remember the chicken base has a fair amount of salt in it already.) Spray an 11x13-inch baking dish with nonstick spray. Spread 1/2 of the shredded squash evenly over the bottom of the dish and top with 1/2 of the pork-vegetable mixture. Repeat for a second layer. Pour cream over the entire dish. Bake, uncovered, in the preheated oven for 30 minutes. I Made It Print Nutrition Facts (per serving) 517 Calories 39g Fat 21g Carbs 25g Protein Show Full Nutrition Label Hide Full Nutrition Label Nutrition Facts Servings Per Recipe 10 Calories 517 % Daily Value * Total Fat 39g 50% Saturated Fat 20g 98% Cholesterol 115mg 38% Sodium 1297mg 56% Total Carbohydrate 21g 8% Dietary Fiber 2g 9% Total Sugars 3g Protein 25g 49% Vitamin C 49mg 54% Calcium 505mg 39% Iron 2mg 13% Potassium 684mg 15% * Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs. ** Nutrient information is not available for all ingredients. Amount is based on available nutrient data. (-) Information is not currently available for this nutrient. If you are following a medically restrictive diet, please consult your doctor or registered dietitian before preparing this recipe for personal consumption.