This Italian Sausage Spaghetti Squash recipe is a delightful twist on traditional pasta dishes. By using spaghetti squash instead of regular pasta, you get a low-carb, gluten-free alternative that pairs perfectly with the rich flavors of Italian sausage and marinara sauce. It's a hearty and satisfying meal that's easy to prepare and full of flavor.
If you're not familiar with spaghetti squash, it's a type of winter squash that, when cooked, has flesh that pulls apart into strands resembling spaghetti. You might also need to look for Italian sausage without casings, which can be found in the meat section of most supermarkets. Marinara sauce is a staple in Italian cooking, but make sure to choose a high-quality one for the best flavor.

Ingredients for Italian Sausage Spaghetti Squash Recipe
Spaghetti squash: A type of winter squash that, when cooked, has flesh that pulls apart into strands resembling spaghetti.
Italian sausage: A flavorful sausage made with a blend of herbs and spices, typically found in the meat section.
Onion: Adds sweetness and depth to the dish when cooked.
Garlic: Provides a pungent, aromatic flavor that enhances the overall taste.
Marinara sauce: A tomato-based sauce that adds richness and moisture to the dish.
Olive oil: Used for drizzling on the squash and cooking the sausage mixture.
Salt: Enhances the flavors of the ingredients.
Pepper: Adds a bit of heat and depth to the dish.
Parmesan cheese: Optional, but adds a savory, nutty flavor when sprinkled on top.
Technique Tip for This Recipe
When roasting the spaghetti squash, make sure to place it cut side down on the baking sheet. This allows the moisture to steam the squash from the inside, resulting in tender and evenly cooked strands. Additionally, using a fork to scrape out the strands while the squash is still warm will make it easier to separate them into long, spaghetti-like pieces.
Suggested Side Dishes
Alternative Ingredients
spaghetti squash - Substitute with zucchini noodles: Zucchini noodles, also known as zoodles, provide a similar texture and are a low-carb alternative.
italian sausage - Substitute with ground turkey: Ground turkey is a leaner option and can be seasoned with Italian herbs to mimic the flavor of Italian sausage.
diced onion - Substitute with shallots: Shallots offer a milder and slightly sweeter flavor compared to onions, which can complement the dish well.
minced garlic - Substitute with garlic powder: Garlic powder can be used in place of fresh garlic, though it is less pungent and should be used in smaller quantities.
marinara sauce - Substitute with crushed tomatoes: Crushed tomatoes can be seasoned with Italian herbs and spices to create a homemade marinara sauce.
olive oil - Substitute with avocado oil: Avocado oil has a similar flavor profile and a high smoke point, making it a good alternative for cooking.
parmesan cheese - Substitute with nutritional yeast: Nutritional yeast provides a cheesy flavor and is a vegan-friendly alternative to parmesan cheese.
Other Alternative Recipes Similar to This Dish
How to Store / Freeze This Dish
Allow the spaghetti squash and sausage mixture to cool completely before storing. This helps prevent condensation, which can make the dish soggy.
Transfer the cooled mixture into airtight containers. For best results, use containers that are appropriately sized for the amount of food you're storing to minimize air exposure.
If you plan to consume the leftovers within a few days, store the containers in the refrigerator. The dish will stay fresh for up to 3-4 days.
For longer storage, consider freezing. Divide the spaghetti squash and sausage mixture into individual portions. This makes it easier to reheat only what you need.
Place the portions into freezer-safe bags or containers. If using bags, squeeze out as much air as possible before sealing to prevent freezer burn.
Label each container or bag with the date and contents. This will help you keep track of how long the dish has been stored.
When ready to reheat, thaw the frozen portions in the refrigerator overnight. This ensures even reheating and maintains the texture of the spaghetti squash.
Reheat the thawed mixture in a skillet over medium heat, stirring occasionally, until heated through. Alternatively, you can use a microwave, heating in short intervals and stirring in between to ensure even warming.
If the dish seems dry after reheating, add a splash of marinara sauce or a drizzle of olive oil to refresh the flavors and moisture.
Top with freshly grated parmesan cheese just before serving to enhance the taste and presentation.
Best Tools for This Recipe
Oven: Used to roast the spaghetti squash until tender.
Baking sheet: Holds the spaghetti squash halves while they roast in the oven.
Knife: Used to cut the spaghetti squash in half lengthwise.
Spoon: Scoops out the seeds from the spaghetti squash.
Fork: Scrapes out the strands of the cooked spaghetti squash.
Large skillet: Cooks the Italian sausage, onion, and garlic.
Wooden spoon: Breaks up the sausage and stirs the ingredients in the skillet.
Measuring cup: Measures the marinara sauce.
Cutting board: Provides a surface to dice the onion and prepare other ingredients.
Grater: Grates the optional parmesan cheese for topping.
Large bowl: Holds the spaghetti squash strands and sausage mixture for tossing.
How to Save Time on This Recipe
Pre-cook the squash: Microwave the spaghetti squash for 5-7 minutes before roasting to cut down on oven time.
Use pre-made sauce: Opt for a high-quality store-bought marinara sauce to save time on preparation.
Batch cook sausage: Cook extra Italian sausage and freeze portions for future quick meals.
Chop ahead: Dice the onion and mince the garlic in advance to streamline cooking.
One-pan method: Cook the sausage, onion, and garlic in the same skillet to reduce cleanup time.

Italian Sausage Spaghetti Squash Recipe
Ingredients
Main Ingredients
- 1 Spaghetti Squash medium-sized
- 1 lb Italian Sausage casings removed
- 1 Onion diced
- 2 cloves Garlic minced
- 1 cup Marinara Sauce
- 1 teaspoon Olive Oil
- to taste Salt and Pepper
- ¼ cup Parmesan Cheese grated, optional
Instructions
- Preheat oven to 400°F (200°C). Cut the spaghetti squash in half lengthwise and scoop out the seeds.
- Drizzle the cut sides with olive oil and season with salt and pepper. Place cut side down on a baking sheet and roast for 40-45 minutes, until tender.
- While the squash is roasting, heat a large skillet over medium heat. Add the Italian sausage and cook until browned, breaking it up with a spoon.
- Add the diced onion and cook until softened, about 5 minutes. Add the minced garlic and cook for another minute.
- Stir in the marinara sauce and let it simmer for a few minutes. Adjust seasoning with salt and pepper.
- When the squash is done, use a fork to scrape out the strands into a large bowl. Toss with the sausage mixture.
- Serve hot, topped with grated Parmesan cheese if desired.
Nutritional Value
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Suggested Appetizers and Desserts
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