Kielbasa Spaghetti Squash Bake Recipe
Introduction
This Kielbasa Spaghetti Squash Bake is a comforting, low-carb twist on traditional pasta dishes. Loaded with savory sausage, melted cheeses, and tender roasted squash, it’s perfect for a cozy weeknight dinner.

Ingredients
- 1 medium spaghetti squash
- 1 tablespoon olive oil
- 12 oz kielbasa sausage, sliced into rounds
- 1 small onion, diced
- 1 bell pepper (any color), diced
- 2 cloves garlic, minced
- 1/2 teaspoon dried oregano
- 1/2 teaspoon paprika
- Salt and pepper, to taste
- 1 cup shredded mozzarella cheese
- 1/2 cup grated Parmesan cheese
- 1/2 cup sour cream or Greek yogurt
- 1/4 cup chopped parsley (optional, for garnish)
Instructions
- Step 1: Preheat the 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 place them cut-side down on a baking sheet. Roast for 35–40 minutes, or until the flesh is tender.
- Step 2: Let the squash cool slightly, then use a fork to scrape out the strands into a large mixing bowl. Set aside.
- Step 3: In a skillet over medium heat, sauté the kielbasa slices until browned, about 5–6 minutes. Remove from the skillet and set aside.
- Step 4: Using the same skillet, cook the diced onion and bell pepper for 4–5 minutes until softened. Add the garlic, oregano, and paprika, cooking for another minute. Season with salt and pepper.
- Step 5: Add the cooked vegetables and kielbasa to the spaghetti squash strands. Stir in sour cream (or Greek yogurt), half the mozzarella, and half the Parmesan cheese, mixing well to combine.
- Step 6: Transfer the mixture to a greased 9×13-inch baking dish. Sprinkle the remaining mozzarella and Parmesan cheese on top.
- Step 7: Bake uncovered for 20–25 minutes, or until the cheese is melted and bubbling. Garnish with chopped parsley if desired. Let sit for 5 minutes before serving.
Tips & Variations
- For a spicier kick, add red pepper flakes when sautéing the vegetables.
- Swap the kielbasa for smoked sausage or chorizo for different flavor profiles.
- Use full-fat Greek yogurt for a tangy alternative to sour cream.
- Top with breadcrumbs before baking for a crunchy finish.
Storage
Store leftovers in an airtight container in the refrigerator for up to 3 days. Reheat gently in the oven or microwave until warmed through. For best texture, reheating in the oven is recommended to keep the cheese bubbly.
How to Serve

Serve this delicious recipe with your favorite sides.
FAQs
Can I prepare this dish ahead of time?
Yes, you can assemble the bake up to a day in advance and keep it covered in the refrigerator. Bake it fresh when ready to serve for the best flavor and texture.
Is spaghetti squash a good low-carb substitute for pasta?
Absolutely! Spaghetti squash offers a similar texture to noodles but with fewer carbs and more fiber, making it a popular alternative for those looking to reduce carb intake.
PrintKielbasa Spaghetti Squash Bake Recipe
This Kielbasa Spaghetti Squash Bake is a hearty and flavorful low-carb dish featuring roasted spaghetti squash combined with savory kielbasa sausage, sautéed vegetables, and a cheesy creamy sauce. It’s perfect for a satisfying weeknight dinner or meal prep, offering a delicious twist on traditional pasta bakes with a nutritious vegetable base.
- Prep Time: 15 minutes
- Cook Time: 1 hour
- Total Time: 1 hour 15 minutes
- Yield: 6 servings 1x
- Category: Main Course
- Method: Baking
- Cuisine: American
- Diet: Low Fat
Ingredients
Spaghetti Squash
- 1 medium spaghetti squash
- 1 tablespoon olive oil
Sausage and Vegetables
- 12 oz kielbasa sausage, sliced into rounds
- 1 small onion, diced
- 1 bell pepper (any color), diced
- 2 cloves garlic, minced
Seasonings
- 1/2 teaspoon dried oregano
- 1/2 teaspoon paprika
- Salt and pepper, to taste
Cheese and Cream
- 1 cup shredded mozzarella cheese
- 1/2 cup grated Parmesan cheese
- 1/2 cup sour cream or Greek yogurt
Garnish (Optional)
- 1/4 cup chopped parsley
Instructions
- Roast Spaghetti Squash: Preheat your oven to 400°F (200°C). Cut the spaghetti squash in half lengthwise, scoop out the seeds, and drizzle the cut sides with olive oil. Place the halves cut-side down on a baking sheet and roast for 35–40 minutes until the flesh is tender and easily shredded with a fork.
- Scoop Squash Strands: Remove the squash from the oven and allow it to cool slightly. Using a fork, scrape the flesh out of the peel into a large mixing bowl, creating spaghetti-like strands. Set aside.
- Sauté Kielbasa: Heat a skillet over medium heat and sauté the kielbasa slices until browned and cooked through, about 5–6 minutes. Remove the kielbasa from the skillet and set aside.
- Sauté Vegetables: In the same skillet, add the diced onion and bell pepper. Cook for 4–5 minutes until softened. Add the minced garlic, dried oregano, and paprika, cooking for an additional minute. Season with salt and pepper to taste.
- Combine Mixture: Add the cooked vegetables and kielbasa to the bowl with the spaghetti squash strands. Stir in the sour cream or Greek yogurt, half of the shredded mozzarella, and half of the grated Parmesan. Mix thoroughly to combine all ingredients.
- Assemble and Bake: Transfer the entire mixture to a greased 9×13-inch baking dish. Sprinkle the remaining mozzarella and Parmesan cheese evenly over the top. Bake uncovered in the preheated oven for 20–25 minutes until the cheese is melted, bubbly, and golden.
- Garnish and Serve: Remove the bake from the oven. Optionally, sprinkle chopped parsley on top for freshness. Let it rest for 5 minutes before serving to allow the flavors to meld.
Notes
- Spaghetti squash can be replaced with other vegetables like zucchini noodles for variation.
- Use Greek yogurt instead of sour cream for a tangier and lower-fat option.
- Leftovers keep well refrigerated for up to 3 days and reheat nicely in the oven or microwave.
- To add more vegetables, consider mixing in chopped mushrooms or spinach during the sauté step.
- Adjust seasoning to your preference; adding a pinch of red pepper flakes can add a spicy kick.
Keywords: kielbasa, spaghetti squash, baked casserole, low carb dinner, sausage bake, cheesy spaghetti squash, healthy casserole

