
Transform healthy spaghetti squash into a satisfying, low-carb comfort meal with this Italian-inspired stuffed version. The natural sweetness of roasted spaghetti squash combines with savory Italian sausage and melted cheese to create a dish that satisfies pasta cravings while keeping carbs in check.
After countless experiments with spaghetti squash, I've discovered that proper roasting technique makes all the difference in achieving that perfect pasta-like texture.
Essential Ingredients
- Spaghetti Squash: 3-4 pounds for best yield
- Italian Sausage: 85/15 for best flavor
- Fresh Mozzarella: Torn for melting
- Parmesan: Freshly grated
- Yellow Onion: Finely diced
- Fresh Garlic: Minced just before using
Detailed Instructions
- 1. Squash Preparation:
- Using sharp knife, carefully cut 3-4 pound spaghetti squash lengthwise. Scoop out seeds and membranes with spoon. Drizzle cut sides with olive oil, season with salt and pepper. Place cut-side down on parchment-lined baking sheet. Bake at 400°F for 35-40 minutes until tender when pierced with fork.
- 2. Sausage Mixture:
- While squash bakes, brown 1 pound Italian sausage in large skillet over medium-high heat. Break into small pieces with wooden spoon. Once browned, transfer to paper-towel lined plate. In same skillet, cook diced onion until soft and golden, about 5-7 minutes. Add minced garlic, cook 30 seconds until fragrant.
- 3. Sauce Development:
- Return sausage to skillet with onions. Add marinara sauce, Italian seasoning, and red pepper flakes if desired. Simmer 10-15 minutes until sauce thickens slightly and flavors meld. Taste and adjust seasonings.
- 4. Squash Preparation:
- When squash is done, let cool slightly. Use fork to gently scrape flesh into spaghetti-like strands, leaving ½-inch border in shell to maintain structure. Season strands lightly with salt and pepper.
- 5. Assembly Process:
- Mix squash strands with half the sausage mixture. Fill squash shells with mixture, top with remaining sauce. Layer with torn mozzarella and grated Parmesan. Broil 3-5 minutes until cheese melts and browns in spots.

Serving and Storage Strategy
Let stuffed squash rest for 5 minutes before serving to set up slightly. For meal prep, prepare components separately: roast squash and prepare filling up to 2 days ahead. Store in airtight containers in refrigerator. Assemble and bake just before serving. Leftovers keep well for 3-4 days in refrigerator.
Perfect Pairings
These stuffed squash halves pair beautifully with light sides that complement without overwhelming. Serve alongside crisp Caesar salad or simple mixed greens with balsamic vinaigrette. Garlic bread makes a perfect addition for family members not counting carbs. A side of roasted broccoli or sautéed green beans adds extra nutrition and color to the plate.
Temperature Considerations
Monitor squash carefully during final broiling - cheese can go from perfectly melted to burnt quickly. If top browns too fast while center is still cold, move rack lower and switch to regular bake setting. For reheating leftovers, cover with foil and warm in 350°F oven until heated through, about 15-20 minutes.

Final Thoughts
This stuffed spaghetti squash represents the perfect balance between healthy and satisfying. Whether serving for family dinner or meal prepping for the week, it delivers rich Italian flavors while keeping carbs in check. Remember, patience during preparation yields the best texture and flavor in the final dish.
Frequently Asked Questions
- → How do I pick a good spaghetti squash?
- Choose one that's firm, golden yellow, and feels heavy for its size.
- → Can I make this ahead?
- Yes, prepare the components separately and assemble just before final baking.
- → How do I store leftovers?
- Store in an airtight container in the fridge for up to 3 days. Reheat in the oven.
- → Can I use different sausage?
- Yes, any ground Italian sausage works - hot or mild based on preference.
- → Is this recipe freezer-friendly?
- Yes, freeze assembled but unbaked squash boats for up to 2 months.