Introduction
This Spaghetti Squash Lasagna transforms a classic comfort food into a lighter, low-carb masterpiece. You’ll love the way the tender squash strands stand in for traditional noodles, creating layers of flavorful turkey, rich cheese, and tangy marinara. It’s a satisfying, crowd-pleasing meal that feels indulgent without the heavy feeling.
Prep & Cook Time
- Prep Time: 15 minutes
- Cook Time: 45 minutes
- Total Time: 1 hour
- Servings: 8
Ingredients
- 1 2-3 lbs spaghetti squash
- 1 lb ground turkey
- 1.5 cups marinara sauce (no sugar added)
- 1 tsp garlic salt (divided)
- 15 oz ricotta
- 6 oz fresh mozzarella
- 3 cups baby spinach (optional)
Instructions
- Preheat your oven to 400°F (200°C).
- Carefully slice the spaghetti squash in half lengthwise and scoop out the seeds. Place the halves cut-side down on a baking sheet lined with parchment paper. Bake for 25-30 minutes, or until the flesh is tender and easily shreds with a fork.
- While the squash bakes, brown the ground turkey in a large skillet over medium-high heat until fully cooked. Drain any excess fat.
- Stir the marinara sauce and 1/2 teaspoon of the garlic salt into the cooked turkey. Reduce heat to low and let it simmer for 5 minutes.
- Once the squash is cool enough to handle, use a fork to scrape the flesh into strands, creating your “noodles.”
- In a medium bowl, mix the ricotta cheese with the remaining 1/2 teaspoon of garlic salt.
- In a 9×13 inch baking dish, begin assembling the lasagna. First, spread half of the shredded spaghetti squash evenly in the dish.
- Layer half of the ricotta mixture over the squash, followed by the optional baby spinach (if using).
- Spoon and spread half of the turkey marinara mixture over the spinach/ricotta layer.
- Repeat the layers: remaining spaghetti squash, remaining ricotta, and the remaining turkey marinara.
- Tear or slice the fresh mozzarella and distribute it evenly over the top layer.
- Bake the assembled lasagna in the preheated oven at 400°F (200°C) for 15-20 minutes, or until the cheese is melted and bubbly. Let it rest for 5-10 minutes before serving.
Variations
- Individual Portions: Assemble the lasagna in personal-sized ramekins for perfectly portioned meals and easier serving.
- Crispy Top: For a more browned, crispy cheese topping, broil the lasagna for the final 1-2 minutes of cooking (watch closely to avoid burning).
- Fresh Herb Finish: Before serving, garnish with a sprinkle of fresh basil or oregano for a bright, aromatic touch.
- Casserole Style: Mix all the cooked squash strands directly into the turkey marinara and ricotta mixtures before baking for a simpler, scoopable casserole.
Tips for Success
- To make cutting the hard squash easier, you can microwave the whole squash for 2-3 minutes to slightly soften the skin.
- Letting the baked lasagna rest for 5-10 minutes before cutting helps the layers set, making it easier to serve clean portions.
- If your squash releases a lot of liquid after baking, gently press the shredded strands in a clean kitchen towel or paper towels to remove excess moisture and prevent a watery lasagna.
- For deeper flavor, you can brown the ground turkey with a pinch of red pepper flakes or Italian seasoning, but remember the recipe already includes garlic salt for seasoning.
Storage & Reheating
Store leftovers in an airtight container in the refrigerator for up to 4 days. To reheat, place a portion in an oven-safe dish, cover with foil, and warm in a 350°F (175°C) oven until heated through, or microwave in 60-second intervals until hot.
FAQ
Can I prepare this ahead of time?
Yes, you can assemble the lasagna up to a day in advance. Cover tightly and refrigerate. Add 5-10 minutes to the baking time when cooking from cold.
Do I have to use ground turkey?
The recipe is designed for ground turkey, but you can use the same technique with other ground meats like beef, chicken, or plant-based crumbles.
Why is my lasagna watery?
This is usually due to excess moisture in the squash. Be sure to thoroughly drain the cooked turkey and consider patting the shredded squash dry with paper towels before assembling.
Can I freeze this lasagna?
Yes. Assemble and bake it, then let it cool completely. Wrap the entire dish or individual portions tightly in plastic wrap and foil. Freeze for up to 2 months. Thaw in the refrigerator overnight before reheating.
Is the spinach necessary?
No, the spinach is optional. It adds color, nutrients, and a pop of green, but the lasagna is delicious without it.
What can I substitute for fresh mozzarella?
For a similar melt and flavor, you can use the same amount of shredded low-moisture mozzarella. The fresh variety simply provides a creamier texture.

