If you’re looking for a cozy, satisfying dinner that brings all the best flavors of a classic cheeseburger into a wholesome, low-carb package, you are going to fall in love with this Cheeseburger Casserole with Spaghetti Squash Recipe. It’s a delightful twist on comfort food that swaps out traditional pasta for tender, roasted spaghetti squash, making each bite light yet deeply flavorful. Imagine juicy ground turkey mingling with tangy pickles, melty cheddar, and a hint of mustard and ketchup, all baked together into a golden, bubbly casserole. This dish is not just a meal; it’s a warm embrace on a plate, perfect for family dinners or meal prepping when you want something a little special but totally fuss-free.

Ingredients You’ll Need
This recipe keeps it wonderfully straightforward with a handful of fresh, pantry-friendly ingredients that work together to create an explosion of flavors and comforting textures. Each element has its rightful place, whether it’s the sweetness of the spaghetti squash or the sharp tang from the pickles and mustard.
- 950g cooked spaghetti squash: This is the star veggie, providing a light, noodle-like base with a slightly sweet flavor that soaks up the sauce beautifully.
- 1 tablespoon olive oil: Helps soften the onions and bring a subtle richness to the meat mixture.
- ½ yellow onion, diced: Adds wonderful aroma and a touch of natural sweetness.
- 1 lb ground turkey (93/7 lean): A lean protein that keeps the dish hearty without being greasy—you can also use ground beef if preferred.
- 1 teaspoon salt: Enhances all the flavors perfectly.
- ½ teaspoon black pepper: Adds a gentle kick and depth of flavor.
- 2 cloves garlic, minced: Brings a bright, savory note that livens up the meat.
- ½ cup ketchup: Brings classic cheeseburger tang and a hint of sweetness.
- ¼ cup mustard: Adds that signature sharp and zesty cheeseburger bite.
- ¼ cup nonfat plain Greek yogurt: A creamy twist that keeps the casserole moist and light.
- ½ cup chopped pickles: For bursts of crunch and acidity that cut through the richness.
- 1 cup shredded lite cheddar cheese, divided: Melts into gooey, savory goodness that binds everything together.
- 3 large eggs: These give the casserole structure and a silky texture when baked.
How to Make Cheeseburger Casserole with Spaghetti Squash Recipe
Step 1: Preheat and Prep
Start by preheating your oven to 400°F (200°C) and greasing a 9×9 inch baking dish so your casserole bakes evenly and doesn’t stick. While the oven heats up, cook your spaghetti squash using your favorite method—roasting it in the oven is classic, but you can microwave or even pressure cook to save time. Once cooked, shred the flesh with a fork until you have light, spaghetti-like strands.
Step 2: Brown Meat and Sauté Onions
Heat olive oil in a skillet over medium-high heat and toss in the diced onions. Let them soften and become fragrant, which typically takes just a few minutes. Next, add the ground turkey alongside salt, pepper, and the minced garlic, breaking it up with a spatula. Cook until the meat is fully browned and crumbled, releasing a rich, mouthwatering aroma that will make you eager to assemble your casserole.
Step 3: Combine Ingredients
In a large mixing bowl, combine the tender spaghetti squash strands with your browned turkey and onion mixture. Stir in ketchup, mustard, Greek yogurt, and chopped pickles to build layers of classic cheeseburger flavor. Each ingredient adds a unique twist, creating a vibrant mix that is anything but ordinary.
Step 4: Add Eggs and Cheese
In a separate bowl, whisk the eggs until smooth. Add half of your shredded cheddar cheese directly to the spaghetti squash mixture and give everything a thorough stir. Then, pour in the whisked eggs and mix gently but completely. This step is key because the eggs help the casserole hold its shape when baked, while the cheese starts to melt into every bite.
Step 5: Bake
Transfer your mixture to the greased baking dish, smoothing it out evenly. Sprinkle the remaining shredded cheddar cheese on top so it can melt and create a gorgeous golden crust. Pop the casserole into the oven and bake for about one hour, or until the dish is set and the top is golden brown with bubbling cheesy goodness.
Step 6: Serve
Once baked, let your cheeseburger casserole cool for about 15 minutes before slicing. This rest time allows the flavors to settle and makes it easier to serve nice, clean portions. Get ready to enjoy a warm, comforting meal that puts a clever and tasty twist on two beloved favorites.
How to Serve Cheeseburger Casserole with Spaghetti Squash Recipe

Garnishes
Elevate your casserole by scattering fresh garnishes like chopped fresh parsley, a sprinkle of extra cheddar, or even crispy fried onions for added crunch. A drizzle of pickled jalapeños or your favorite hot sauce can also add a fun kick for those who love spicy flavors.
Side Dishes
This dish stands beautifully on its own, but pairing it with a crisp green salad, roasted vegetables, or a light coleslaw refreshes the palate and balances the richness of the casserole. For a low-carb feast, steamed broccoli or sautéed green beans are perfect companions.
Creative Ways to Present
Looking to impress guests or just make dinner extra special? Serve the casserole in individual ramekins or muffin tins for personal portions that look charming and inviting. You can also top each portion with a dollop of Greek yogurt or a spoonful of relish to mimic the classic cheeseburger toppings in a playful, unexpected way.
Make Ahead and Storage
Storing Leftovers
If you have any leftovers (which might be rare), store them in an airtight container in the refrigerator. The casserole will keep well for up to 4 days, maintaining its flavor and texture nicely. Simply cover it tightly to prevent drying out.
Freezing
This Cheeseburger Casserole with Spaghetti Squash Recipe also freezes well. Portion it out into freezer-safe containers and you can keep it frozen for up to 3 months. Thaw overnight in the fridge before reheating to help preserve the flavors and texture.
Reheating
For reheating, the oven is best to keep the casserole’s crust crispy and delicious. Heat at 350°F (175°C) for about 15-20 minutes or until warmed through. If you’re short on time, the microwave works but may soften the golden top slightly.
FAQs
Can I use ground beef instead of ground turkey?
Absolutely! Ground beef makes this casserole richer and more traditional, but ground turkey keeps it lighter. Either option works wonderfully.
How do I cook spaghetti squash quickly?
Microwaving spaghetti squash halves for 10-12 minutes is a great shortcut. Just scoop out the seeds, microwave flesh-side down in a covered dish, and shred when done.
Is there a vegetarian version of this casserole?
Yes! Swap the ground meat for cooked lentils or crumbled tempeh, and use vegan cheese for a plant-based twist on this flavorful dish.
Can I make this casserole dairy-free?
Definitely. Use dairy-free cheese and substitute Greek yogurt with a plain non-dairy yogurt or a dollop of cashew cream to keep that creamy texture.
What makes this casserole low-carb?
By using spaghetti squash instead of pasta or bread, this recipe reduces carbs while still delivering that comforting “cheeseburger” satisfaction in every bite.
Final Thoughts
There’s something incredibly comforting and creative about this Cheeseburger Casserole with Spaghetti Squash Recipe, and I can’t wait for you to try it. It’s a perfect way to enjoy the flavors you love with a fresh, healthy twist. Whether you’re making it for a busy weeknight or a special weekend meal, this casserole will quickly become one of your go-to recipes that feels both indulgent and nourishing. Give it a shot and watch it disappear from the table with smiles all around!
Print
Cheeseburger Casserole with Spaghetti Squash Recipe
- Prep Time: 20 minutes
- Cook Time: 1 hour 10 minutes
- Total Time: 1 hour 30 minutes
- Yield: 6 servings
- Category: Casserole
- Method: Baking
- Cuisine: American
- Diet: Low Fat
Description
This flavorful Cheeseburger Casserole with Spaghetti Squash is a healthy twist on a classic comfort food. Using lean ground turkey and nutrient-rich spaghetti squash, it delivers all the savory goodness of a cheeseburger in a wholesome baked casserole form. The combination of tangy ketchup, mustard, Greek yogurt, and pickles creates a deliciously creamy and tangy profile, topped with melted cheddar cheese for a satisfying finish.
Ingredients
Main Ingredients
- 950g cooked spaghetti squash (about 1 large spaghetti squash)
- 1 tablespoon olive oil
- ½ yellow onion, diced
- 1 lb ground turkey (93/7 lean) – can substitute with ground beef
- 1 teaspoon salt
- ½ teaspoon black pepper
- 2 cloves garlic, minced
- ½ cup ketchup
- ¼ cup mustard
- ¼ cup nonfat plain Greek yogurt
- ½ cup chopped pickles
- 1 cup shredded lite cheddar cheese, divided
- 3 large eggs
Instructions
- Preheat and Prep: Preheat the oven to 400°F (200°C). Grease a 9×9 inch baking dish. Cook the spaghetti squash according to your preferred method (e.g., roasting or microwaving) and then shred the flesh with a fork.
- Brown Meat and Sauté Onions: Heat olive oil in a skillet over medium-high heat. Add diced onion and cook until softened, about 3-5 minutes. Add ground turkey, salt, pepper, and minced garlic. Cook the meat until browned and crumbled, about 7-10 minutes.
- Combine Ingredients: In a large bowl, mix together the cooked spaghetti squash, browned ground turkey mixture, ketchup, mustard, Greek yogurt, and chopped pickles until well combined.
- Add Eggs and Cheese: In a separate bowl, whisk the eggs. Add half of the shredded cheddar cheese to the spaghetti squash mixture and stir to combine. Pour in the whisked eggs and mix everything thoroughly.
- Bake: Transfer the mixture to the prepared baking dish and spread it evenly. Top with the remaining shredded cheddar cheese. Bake in the preheated oven for 1 hour, or until the casserole is set and the top is golden brown.
- Serve: Remove from the oven and allow the casserole to cool for 15 minutes before serving to help it set and make slicing easier.
Notes
- You can substitute the ground turkey with lean ground beef if preferred.
- Cooking the spaghetti squash by roasting in the oven at 400°F for about 40 minutes yields the best texture, but microwaving is a quicker alternative.
- Using lite cheddar cheese reduces fat content while maintaining flavor.
- Letting the casserole cool before serving ensures it holds together better when sliced.
- This dish can be prepared a day ahead and reheated in the oven for convenience.

