Cheesy Low Carb Spaghetti Squash Bake
Cheesy Low Carb Spaghetti Squash Bake is a satisfying dinner made with roasted spaghetti squash, seasoned ground beef, tomato sauce, herbs, and melted cheese. It delivers the comfort of a baked pasta casserole with fewer carbohydrates.
Spaghetti Squash Bake is filling without traditional pasta. Roasted squash separates into tender strands that soak up the savory meat sauce and melted cheese.
Spaghetti Squash Bake is easy to customize with beef, turkey, chicken, sausage, or vegetables, making it useful for meal prep and family dinners.
Preparation Time: 20 minutes
Cooking Time: 55 minutes
Total Time: 1 hour 15 minutes
Servings: 6
Ingredients
For the spaghetti squash
1 large spaghetti squash, about 3 to 4 pounds
1 tablespoon olive oil
1/2 teaspoon salt
1/4 teaspoon black pepper
For the meat sauce
1 tablespoon olive oil
1 pound lean ground beef
1 small yellow onion, finely chopped
3 garlic cloves, minced
1 1/2 cups low-sugar marinara sauce
1 tablespoon tomato paste
1 teaspoon Italian seasoning
1/2 teaspoon dried oregano
1/2 teaspoon smoked paprika
1/4 teaspoon red pepper flakes, optional
1/2 teaspoon salt
1/4 teaspoon black pepper
For the cheese layer
1 cup ricotta cheese
1 large egg
1/2 cup grated Parmesan cheese
1 1/2 cups shredded mozzarella cheese
1/2 teaspoon Italian seasoning
2 tablespoons chopped fresh parsley
Instructions
Roast the spaghetti squash
Preheat the oven to 400°F or 200°C. Carefully cut the spaghetti squash in half lengthwise and scoop out the seeds and stringy center with a spoon.
Brush the cut sides lightly with olive oil and season with salt and black pepper. Place the halves cut side down on a parchment-lined baking sheet.
Roast for about 35 to 40 minutes, depending on the size of the squash. The flesh should be tender enough to scrape into strands but not so soft that it becomes mushy. Good texture is important because Spaghetti Squash Bake should have defined strands that hold up well under the sauce and cheese.
Let the squash cool for several minutes, then use a fork to scrape the flesh into spaghetti-like strands. Transfer the strands to a large bowl and set aside.
Prepare the meat sauce
While the squash roasts, heat olive oil in a large skillet over medium heat. Add the chopped onion and cook for about four minutes until softened.
Add the ground beef and cook until browned, breaking it into small pieces with a wooden spoon. Drain excess grease if needed.
Stir in the garlic and cook for about thirty seconds. Add the marinara sauce, tomato paste, Italian seasoning, oregano, smoked paprika, red pepper flakes, salt, and black pepper.
Reduce the heat and let the sauce simmer for about 10 minutes. This allows the flavors to combine and gives Spaghetti Squash Bake a rich, savory base.
Prepare the cheese mixture
In a medium bowl, combine the ricotta cheese, egg, Parmesan, Italian seasoning, and half of the chopped parsley. Mix until smooth.
Remove excess moisture
Spaghetti squash naturally contains a fair amount of water, so this step helps prevent a watery casserole. Place the cooked squash strands in a clean kitchen towel or several layers of paper towels and gently press out excess moisture.
Do not squeeze too aggressively because you still want the strands to remain tender. Removing some moisture makes Spaghetti Squash Bake hold together better when sliced.
Assemble the casserole
Lightly grease a 9-by-13-inch baking dish. Spread half of the spaghetti squash strands across the bottom.
Spoon half of the meat sauce over the squash and spread it evenly. Add dollops of half the ricotta mixture, then sprinkle with one-third of the mozzarella.
Repeat with the remaining squash, meat sauce, and ricotta. Finish with the rest of the mozzarella and an extra sprinkle of Parmesan if desired.
Bake until bubbly
Reduce the oven temperature to 375°F or 190°C. Place the assembled casserole in the oven and bake uncovered for 25 to 30 minutes.
The edges should be bubbling and the cheese should be melted and lightly golden. If you prefer a darker top, broil for one to two minutes at the end while watching closely.
Remove Spaghetti Squash Bake from the oven and let it rest for 10 minutes before serving. Resting allows the layers to settle and makes portions easier to cut.
Finish with the remaining parsley and serve warm.
Tips
Do not overcook the squash
Roast the squash only until the strands separate easily but still have a little firmness. Overcooking can make Spaghetti Squash Bake too soft.
Drain extra liquid
Removing excess moisture from the squash is one of the most important steps. Watery squash or very thin marinara can make the finished casserole loose.
Use a thick marinara sauce
Choose a thick marinara rather than a watery sauce. A lower-sugar option works well for a lower-carb meal.
Let the casserole rest
Rest the casserole for 10 minutes so the layers hold together.
Season every layer
Spaghetti squash has a mild flavor, so seasoning the squash, sauce, and cheese mixture separately gives the best overall result.
Variations
Chicken version
Replace the ground beef with cooked shredded chicken or ground chicken. Add the chicken directly to the tomato sauce and simmer briefly before assembling the casserole.
Turkey version
For a lighter protein, make Spaghetti Squash Bake with lean ground turkey. Add a little olive oil if the turkey is very lean.
Vegetarian version
Replace the meat with sautéed mushrooms, zucchini, spinach, and bell peppers. Cook the vegetables until most of their moisture has evaporated before adding them to Spaghetti Squash Bake.
Extra-cheesy version
Add provolone, fontina, or cheddar along with the mozzarella. Keep Parmesan in the mixture because its sharper flavor balances the mild squash and creamy ricotta.
Spicy version
Increase the red pepper flakes or add chopped jalapeño to the meat sauce. Pepper Jack cheese can also replace some of the mozzarella.
Italian sausage version
Use mild or spicy Italian sausage instead of ground beef. The seasoning in sausage gives Spaghetti Squash Bake an even deeper savory flavor.
Serving Suggestions
Spaghetti Squash Bake is hearty enough to serve on its own, but simple sides can round out the meal. A crisp green salad with cucumber, tomato, and lemon vinaigrette adds freshness and balances the rich cheese.
Roasted broccoli, asparagus, green beans, or Brussels sprouts are also excellent sides. If you are not strictly limiting carbohydrates, garlic bread or a small piece of crusty bread works well for soaking up the tomato sauce.
For a low-carb dinner, pair Spaghetti Squash Bake with a side salad, roasted cauliflower, or sautéed greens. A spoonful of extra marinara and a sprinkle of Parmesan on top also make each serving feel more complete.
“For another high-protein, low-carb meal idea, try our Alfredo Chicken Wings (High Protein, Low Carb, Diabetic-Friendly).”
Q&A
Can I make this recipe ahead of time?
Yes. Assemble Spaghetti Squash Bake up to one day ahead, cover the dish, and refrigerate it. Let it sit at room temperature for about 20 minutes before baking, or add a few extra minutes to the cooking time if it goes into the oven cold.
Can I freeze it?
Yes, although the texture of spaghetti squash may soften slightly after thawing. Freeze the fully baked casserole in individual portions or in a freezer-safe dish for up to two months.
Why is my casserole watery?
The most common cause is excess moisture in the squash. Be sure to press out some liquid after roasting. A thin marinara sauce can also contribute extra moisture.
Can I use cottage cheese instead of ricotta?
Yes. Cottage cheese works well and can add more protein. Blend it briefly first if you want a smoother texture.
Is this recipe keto-friendly?
It is lower in carbohydrates than traditional pasta casseroles, but spaghetti squash still contains carbohydrates, so suitability depends on your personal target and serving size.
Can I use pre-cooked spaghetti squash?
Yes. Leftover roasted squash works well in Spaghetti Squash Bake. Make sure the strands are not too wet before assembling.
Nutrition
One serving of Spaghetti Squash Bake contains approximately 430 calories, depending on the cheese, meat, and marinara sauce used. A serving provides around 30 grams of protein, 20 grams of carbohydrates, 27 grams of fat, 5 grams of fiber, and approximately 760 milligrams of sodium.
Spaghetti squash provides fiber, while beef and cheese contribute protein. Using leaner meat, part-skim cheese, and lower-sodium marinara can lighten the dish. Nutrition values are estimates and vary by ingredients and portion size.
If you enjoy rich low-carb comfort food, you may also love our Creamy Crack Chicken Soup – High-Protein, Low-Carb Comfort Food.”
Conclusion
Spaghetti Squash Bake is an easy way to enjoy the comfort of a cheesy baked casserole while replacing traditional pasta with tender strands of roasted squash. The combination of savory meat sauce, creamy ricotta, Parmesan, and bubbling mozzarella creates a satisfying dinner with plenty of flavor.
Because it can be assembled ahead, this recipe is especially useful for busy weeknights or meal prep and can be customized with different proteins or vegetables.
Serve Spaghetti Squash Bake with salad or roasted vegetables for a complete meal that feels warm, hearty, and comforting. Its cheesy layers, rich tomato sauce, and flexible ingredients make Spaghetti Squash Bake a dependable low-carb-inspired dinner to add to your regular recipe rotation.