How do I cook the spaghetti squash?

Spaghetti squash can be cooked and shredded using the oven, air fryer, or microwave.

Does this work well for meal prep?

Yes! Store this casserole in an airtight container in the fridge and it will stay good for up to one week.

Can I make this vegan?

Yes, simply substitute the ground beef with crumbled black bean burgers or a plant-based meat alternative, and use plant-based cheese and dairy-free cream cheese.

Cheeseburger Spaghetti Squash Casserole

This low-carb casserole combines the classic flavors of a cheeseburger with the nutritional benefits of spaghetti squash. It is a practical, family-friendly meal that simplifies weeknight dinner preparation. This dish is designed to be high in protein and low in calories.

List of ingredients

1 large spaghetti squash (750g), cooked and shredded – provides the base structure.
1 medium yellow onion (220g), diced – adds aromatic flavor.
8 oz. mushrooms, roughly chopped – adds texture and earthiness.
1 lb. 96/4 ground beef – lean protein source.
1 14.5 oz can diced tomatoes, drained – adds acidity and moisture.
4 oz. reduced-fat cream cheese (112g), softened – acts as a creamy binder.
1 Tbsp steak seasoning – provides savory burger-style seasoning.
1/4 tsp salt – enhances overall flavors.
1 cup shredded cheddar cheese (112g), divided – used for mixing and topping.

step-by-step instructions

Prepare Oven and Dish: Preheat the oven to 375 degrees F. Spray a 9×13-inch baking dish with cooking spray to prevent the mixture from sticking.
Sauté Aromatics: Spray a skillet with cooking spray and add the diced onions and chopped mushrooms. Cook on medium heat for 4-5 minutes until tender, then drain excess liquid and transfer them to a large bowl.
Brown the Beef: Add the ground beef to the same skillet and cook on medium heat until fully browned, breaking the meat into small pieces. Drain any accumulated fat.
Combine Ingredients: Add the cooked beef, drained tomatoes, softened cream cheese, 1/2 cup of shredded cheese, salt, and steak seasoning to the bowl with the vegetables. Mix well until the cream cheese is evenly distributed.
Assemble Casserole: Transfer the combined mixture into the prepared baking dish and spread it into an even layer. Sprinkle the remaining 1/2 cup of shredded cheese over the top.
Bake: Bake for 20-25 minutes until the cheese is melted and bubbling.

Expert Preparation Tips

Preparing Spaghetti Squash in Advance

Cook and shred the spaghetti squash a day before you plan to make the casserole. Store the strands in an airtight container in the refrigerator to save time during the main cooking process.

Choosing the Right Ground Beef

Use 96/4 lean ground beef to ensure the dish does not become overly greasy. If using a higher fat percentage, be sure to drain the pan thoroughly after browning the meat.

Reducing Excess Moisture

Press the shredded spaghetti squash with a paper towel or a fine-mesh strainer before adding it to the mix. This step prevents the casserole from becoming watery during the baking process.

Ensuring a Smooth Sauce

Microwave the reduced-fat cream cheese for 10 to 15 seconds until it is very soft. This ensures the cheese blends smoothly into the beef mixture without leaving large lumps.

Ingredient Alternatives and Substitutions

Substituting Ground Meats

You can replace the ground beef with ground turkey or ground chicken for a leaner alternative. Adjust the salt and steak seasoning slightly, as poultry has a milder flavor than beef.

Using Plant-Based Protein

Replace the ground beef with crumbled black bean burgers or a plant-based meat substitute. Ensure the meat alternative is fully cooked and browned before mixing it with the other ingredients.

Swapping the Cheese Variety

Use Pepper Jack cheese instead of cheddar for a spicy flavor profile. Mozzarella can also be used for a milder taste and a stretchier texture on top of the casserole.

Alternative Creamy Binders

Substitute the cream cheese with Neufchâtel cheese or a thick Greek yogurt. These options provide a similar creamy consistency while altering the nutritional content.

Flavor Variations to Try

Adding Smoky Notes

Mix in a teaspoon of smoked paprika or a drop of liquid smoke. This mimics the flavor of a burger cooked over an open flame.

Incorporating Spicy Peppers

Add diced jalapeños or canned green chiles to the skillet while sautéing the onions. This adds a spicy kick and extra depth to the beef mixture.

Creating a BBQ Style Version

Stir two tablespoons of sugar-free BBQ sauce into the beef and vegetable mixture. This shifts the flavor profile toward a Western-style burger.

Adding Savory Meat Accents

Mix in cooked, crumbled turkey bacon or lean ham bits. This adds a salty contrast that complements the cheddar cheese and ground beef.

Serving Recommendations

Fresh Vegetable Pairings

Serve a portion of the casserole with a crisp side salad of mixed greens and a light vinaigrette. The acidity of the dressing balances the richness of the cheese and beef.

Classic Burger Garnishes

Top individual servings with sliced dill pickles and fresh tomato wedges. These additions reinforce the cheeseburger theme and add a fresh crunch to the meal.

Condiment Pairings

Offer sugar-free ketchup or yellow mustard on the side for dipping. These traditional condiments complement the savory notes of the steak seasoning.

Roasted Root Vegetable Sides

Pair the dish with roasted carrots or steamed broccoli. These sides increase the nutrient density of the meal without adding significant calories.

Storage and Preservation

Refrigeration Guidelines

Store leftovers in an airtight container in the refrigerator for up to one week. Allow the casserole to cool completely before sealing the lid to prevent condensation.

Freezing Instructions

Freeze the casserole in individual portions using freezer-safe containers or tightly wrapped foil. This dish remains high in quality for up to three months in the freezer.

Proper Thawing Process

Thaw frozen portions in the refrigerator overnight before reheating. Avoid thawing at room temperature to ensure food safety and maintain the texture of the squash.

Reheating Methods

Oven Reheating

Place the casserole in a baking dish and cover it with foil. Heat at 350 degrees F for 15 to 20 minutes to maintain the texture of the cheese and squash.

Microwave Reheating

Heat individual portions on medium power in one-minute intervals. Stir the mixture between intervals to ensure the heat is distributed evenly throughout the dish.

Stovetop Reheating

Place a portion in a non-stick skillet with a small splash of water or broth. Cover with a lid and heat over medium heat until warmed through.

Make-Ahead Strategies

Assembling the Casserole Early

You can mix all the ingredients and spread them in the baking dish up to 24 hours in advance. Keep the dish refrigerated and add the top layer of cheese just before baking.

Batch Cooking for Meal Prep

Prepare multiple 9×13 dishes at once to stock your freezer. This allows for quick, healthy dinner options during busy work weeks.

Pre-Cutting Vegetables

Dice the onions and chop the mushrooms at the start of the week. Store them in separate containers to reduce the active prep time on the day of cooking.

Troubleshooting Common Issues

Dealing with Watery Results

If the casserole appears too wet, ensure the tomatoes are drained thoroughly and the squash is pressed. You can also bake the dish for an additional 5 minutes without a cover.

Preventing Burnt Top Cheese

Cover the baking dish with aluminum foil if the cheese browns too quickly. Remove the foil for the final 5 minutes of baking to achieve a bubbly finish.

Fixing Lumpy Sauce

If the cream cheese does not blend smoothly, ensure it is fully softened at room temperature. If lumps remain, stir the mixture more vigorously before transferring it to the dish.

Frequently Asked Questions

Can I use a different squash?

Butternut squash can be used, but it has a denser texture. Spaghetti squash is specifically recommended because its strands mimic the texture of pasta.

Is this recipe gluten-free?

Yes, the natural ingredients used in this recipe are gluten-free. Always check the label of your steak seasoning to ensure no gluten-containing additives are present.

How do I tell when the squash is done?

The spaghetti squash is cooked when the skin is easily pierced with a fork. The flesh should pull away from the skin in long, distinct strands.

Can I add more vegetables?

Yes, diced bell peppers, spinach, or zucchini are excellent additions. Sauté these vegetables with the onions and mushrooms before mixing them into the beef.