Spaghetti Squash Lasagna Casserole (Low Carb)

I’ll never forget the first time I attempted lasagna. It was for a potluck, and I envisioned myself the culinary queen, arriving with a bubbling, cheesy masterpiece. What I actually delivered was a watery, structurally unsound mess that tasted vaguely of sadness. Mortified, I vowed to master the art of layered Italian goodness. That’s why I was so thrilled to discover this Spaghetti Squash Lasagna Casserole. It’s everything I love about lasagna – the rich tomato sauce, the creamy cheese, the comforting layers – without the carb overload, and far more forgiving than its traditional counterpart. It’s a dish that lets me channel my lasagna ambitions without the fear of another potluck disaster!

Recipe Overview

• Prep Time: 30 minutes
• Cook Time: 1 hour 45 minutes
• Total Time: 2 hours 15 minutes
• Servings: 8
• Yield: 1 casserole
• Dietary Type: Low Carb

Ingredients

• 1 large spaghetti squash (about 4.5 pounds)
• 4 ounces chevre cheese
• 15 ounces ricotta cheese
• 8 ounces mozzarella cheese, grated
• 1 egg
• ¼ cup grated parmesan cheese
• 2 (28 ounce) cans of whole tomatoes with basil
• 1 lb of bulk Italian turkey sausage (spicy or sweet)
• 1 small onion, finely diced
• 4 large garlic cloves, minced
• Salt and pepper to taste
• 2 tablespoons olive oil

Equipment Needed

• Large baking sheet
• Fork
• Large pot
• Large frying pan
• Lasagna pan (9×13 inch)

Instructions

1. Preheat your oven to 400 degrees Fahrenheit.
2. Prepare the spaghetti squash by pricking it all over with a fork. This allows steam to escape and prevents explosions in the oven!
3. Roast the squash directly on the baking sheet for an hour, or until it feels soft when you press on it. The roasting time may vary depending on the size of your squash. You want it to be easily pierced with a fork.
4. Remove the squash from the oven and let it cool on the counter until it’s cool enough to handle.
5. While the squash is roasting, start the tomato sauce. In a large pot, brown the Italian turkey sausage with 1 tablespoon of olive oil over medium-high heat. Be sure to break up the sausage into small pieces as it cooks.
6. Once the sausage is browned, add the diced onion and half of the minced garlic to the pot. Cook until the onion becomes transparent, about 5 minutes.
7. Add the canned whole tomatoes with basil to the pot. Using a spoon or potato masher, break up the tomatoes into smaller pieces.
8. Partially cover the pot and simmer the sauce over low heat for about two hours, stirring occasionally to prevent sticking. Season with salt and pepper to taste. The longer the sauce simmers, the richer the flavor will be!
9. Once the spaghetti squash is cool enough to handle, cut it in half lengthwise and scoop out the seeds.
10. Scoop out the flesh of the squash with a spoon, creating spaghetti-like strands. Place the strands in a bowl.
11. In a large frying pan, heat the remaining 1 tablespoon of olive oil over medium heat. Add the remaining minced garlic and cook until fragrant, about 30 seconds. Be careful not to burn the garlic!
12. Add the spaghetti squash strands to the frying pan and sauté for a few minutes, until the squash begins to brown slightly. Season with salt and pepper to taste. This step helps to remove excess moisture from the squash.
13. In a separate bowl, combine the ricotta cheese, chevre cheese, grated parmesan cheese, egg, and half of the grated mozzarella cheese. Mix well until all ingredients are fully incorporated. This cheese mixture will provide the creamy, decadent layer in your lasagna casserole.
14. Preheat your oven to 375 degrees Fahrenheit.
15. Prepare a lasagna pan (9×13 inch) by pouring a ladleful of the tomato sauce into the bottom of the pan, coating it evenly. This prevents the squash from sticking and adds flavor to the bottom layer.
16. Add the sautéed spaghetti squash to the lasagna pan, spreading it out in an even layer.
17. Top the squash with the ricotta cheese mixture, spreading it evenly over the squash.
18. Pour the remaining tomato sauce over the ricotta cheese mixture.
19. Sprinkle the remaining grated mozzarella cheese over the top of the casserole.
20. Bake the lasagna casserole for an hour, or until it is brown and bubbling all over. The cheese should be melted and golden brown, and the sauce should be bubbly.
21. Remove the casserole from the oven and let it rest for at least 10 minutes before serving. This allows the casserole to set and makes it easier to cut and serve.

Expert Tips & Tricks

• Roasting the Spaghetti Squash: Don’t skip the pricking step! It’s crucial for preventing explosions in the oven. Also, roasting cut-side down can result in a mushy squash.
• Draining the Squash: Spaghetti squash can be quite watery. Sautéing it in a pan helps to dry it out, preventing a soggy casserole. For extra insurance, you can place the cooked squash in a colander and let it drain for a bit before sautéing.
• Cheese Selection: Feel free to experiment with different cheeses. Provolone, fontina, or even a smoked gouda would add a unique flavor dimension.
• Sauce Simmering Time: While the recipe calls for a two-hour simmer, you can get away with a shorter simmer if you’re short on time. However, the longer the sauce simmers, the richer and more complex the flavors will become.
• Make-Ahead Tip: You can assemble the entire casserole a day in advance and store it in the refrigerator. Just add about 15-20 minutes to the baking time.

Serving & Storage Suggestions

Serve the Spaghetti Squash Lasagna Casserole warm, straight from the oven. Garnish with fresh basil or a sprinkle of Parmesan cheese for a beautiful presentation. A simple side salad with a light vinaigrette complements the richness of the casserole.

Leftovers can be stored in the refrigerator for up to 3-4 days. To reheat, cover the casserole with foil and bake at 350 degrees Fahrenheit until heated through. You can also microwave individual portions for a quick and easy meal. For longer storage, the casserole can be frozen for up to 2-3 months. Thaw it overnight in the refrigerator before reheating.

Nutritional Information

Nutrient	Amount per Serving	% Daily Value
Calories	396.9 kcal	N/A
Calories from Fat	251 g	63%
Total Fat	27.9 g	42%
Saturated Fat	12.5 g	62%
Cholesterol	118 mg	39%
Sodium	890.3 mg	37%
Total Carbohydrate	10.4 g	3%
Dietary Fiber	0.7 g	2%
Sugars	3.1 g	12%
Protein	26.6 g	53%

Variations & Substitutions

• Vegetarian: Omit the turkey sausage and add sautéed vegetables like mushrooms, zucchini, bell peppers, and spinach to the sauce.
• Spicy: Use spicy Italian sausage and add a pinch of red pepper flakes to the sauce for an extra kick.
• Dairy-Free: Substitute the ricotta and mozzarella cheese with dairy-free alternatives made from cashews or almonds.
• Herb Variations: Experiment with different herbs in the sauce. Oregano, thyme, or rosemary would all be delicious additions.
• Different Squash: While spaghetti squash is the star of this recipe, you could experiment with other low-carb vegetables, such as sliced eggplant or zucchini, as a base for the casserole.
• Different cheese: Use provolone, fontina, or even a smoked gouda would add a unique flavor dimension.

FAQs (Frequently Asked Questions)

Q: Can I use ground beef instead of turkey sausage?
A: Absolutely! Ground beef, chicken, or even plant-based crumbles would work well in this recipe.

Q: Can I make this ahead of time?
A: Yes, you can assemble the casserole a day in advance. Just cover it and store it in the refrigerator, then add about 15-20 minutes to the baking time.

Q: How do I prevent the casserole from being watery?
A: Sautéing the spaghetti squash helps remove excess moisture. You can also drain the cooked squash in a colander before sautéing it.

Q: Can I freeze this casserole?
A: Yes, you can freeze it for up to 2-3 months. Thaw it overnight in the refrigerator before reheating.

Q: What if I don’t have canned tomatoes with basil?
A: You can use plain canned tomatoes and add dried basil to the sauce to taste.

Final Thoughts

This Spaghetti Squash Lasagna Casserole is a guaranteed crowd-pleaser. It’s a comforting, flavorful, and relatively healthy dish that’s perfect for weeknight dinners or potlucks. Don’t be afraid to get creative with the ingredients and customize it to your liking. I encourage you to try this recipe and experience the joy of lasagna without the carb guilt! Pair it with a crisp green salad and a glass of your favorite red wine for a complete and satisfying meal. And please, share your creations and feedback – I’d love to hear how it turned out!