Pesto Spaghetti Squash

There’s something so satisfying about a dish that feels indulgent but lands light and bright on the palate. This Pesto Spaghetti Squash is one of those meals: tender strands of squash tossed with fragrant basil pesto, a shower of coarsely grated Parmesan, and a touch of olive oil and herbs. It’s an easy weeknight winner, great for meal prep, and makes a lovely side or a main when served with a crisp salad. The flavors are familiar, comforting, and clean—much like the best of home-cooked Italian-inspired dishes.

Why you’ll love this recipe

• Quick to prepare and easy to customize. Swap herbs, increase the pesto, or add veggies and protein.
• Light texture without skimping on flavor thanks to the Parmesan and herb blend.
• Minimal ingredients: everything comes together in under an hour with little hands-on time.

Ingredients

• 1 large spaghetti squash (see notes)
• 2 T olive oil
• 2 tsp. Italian Herb Blend (or use other seasoning of your choice)
• 3 T basil pesto (more or less to taste)
• 1 1/4 cups coarsely grated Parmesan cheese
• salt and fresh ground black pepper to taste

Notes on the main ingredient

A large spaghetti squash will yield enough strands for 3–4 servings, depending on appetite. Look for a firm squash without soft spots. You can roast it whole or halved; halving speeds cooking and makes it easier to scoop out the strands. If you have a crowd, use two squashes and multiply the remaining ingredients accordingly.

Equipment you’ll need

• Baking sheet and parchment or a shallow baking dish
• Sharp knife and a sturdy spoon
• Fork for shredding the squash into strands
• Mixing bowl and a spatula or tongs

Flavor variations and add-ins

• Add roasted cherry tomatoes for a sweet-tart pop.
• Toss in cooked chickpeas or white beans for added texture and protein.
• Sautéed mushrooms or blanched green beans make lovely vegetable additions.
• For a nuttier pesto flavor, stir in a tablespoon of toasted pine nuts or chopped walnuts.

Step-by-step Instructions

1. Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper or lightly grease a shallow baking dish.
2. Prepare the squash: Using a sharp knife, carefully cut the large spaghetti squash in half lengthwise. Scoop out and discard the seeds and stringy bits from the center of each half.
3. Brush the cut sides of the squash with 2 T olive oil. Sprinkle each half evenly with 2 tsp. Italian Herb Blend and a pinch of salt and fresh ground black pepper to taste.
4. Place the squash cut-side down on the prepared baking sheet or in the baking dish. Roast in the preheated oven until the flesh is tender and easily pulls into strands with a fork, about 35–45 minutes depending on the size of the squash.
5. Remove the roasted squash from the oven and let it cool for 5 minutes so it’s easier to handle. Using a fork, gently scrape the flesh of each half to create long, spaghetti-like strands. Transfer the strands to a large mixing bowl, leaving the skins behind.
6. Add the pesto: Spoon 3 T basil pesto over the hot squash strands. Toss gently with a spatula or tongs until the pesto is evenly distributed. Taste and add more pesto if you prefer a bolder flavor.
7. Fold in 1 1/4 cups coarsely grated Parmesan cheese. Toss again until the cheese is melted into the warm strands and everything is well coated. Season with additional salt and fresh ground black pepper to taste.
8. Serve immediately while warm. Garnish with an extra sprinkle of Parmesan and a grind of black pepper if desired. Leftovers can be refrigerated in an airtight container for up to 3 days; gently reheat in a skillet over low heat.

Serving suggestions

This pesto-packed spaghetti squash pairs beautifully with a simple mixed greens salad dressed with lemon and olive oil. For heartier meals, serve alongside grilled chicken or pan-seared fish. It also makes a satisfying vegetarian plate when topped with roasted chickpeas or slices of pan-fried halloumi-style cheese.

Make-ahead and storage

You can roast the squash up to two days in advance and store the strands in the refrigerator. When ready to eat, rewarm the strands briefly and toss with pesto, Parmesan, and seasoning. Finished leftovers keep well for up to 3 days in a sealed container. Avoid freezing once mixed with pesto and cheese, as the texture will change.

Final tips for best results

• Don’t overcook the squash. You want the flesh tender but not mushy so it forms distinct strands.
• Adjust the pesto amount to your taste—3 T is a balanced starting point, but feel free to add more for a richer herb-forward dish.
• Use freshly grated Parmesan for the best melt and flavor; pre-grated powder won’t give the same texture.
• If your pesto is very thick, stir in a teaspoon of olive oil or a splash of warm water to loosen it so it coats the squash evenly.

Nutrition snapshot

This Pesto Spaghetti Squash is lighter than traditional pasta dishes while still delivering savory satisfaction from the Parmesan and pesto. It’s a great option when you want fewer carbs without sacrificing flavor.

Closing thoughts

Simple, satisfying, and full of bright basil flavor, this Pesto Spaghetti Squash is a weeknight hero. It’s forgiving, adaptable, and a delightful way to enjoy a vegetable-forward pasta alternative. Whether you’re feeding a crowd or prepping lunches, it’s a reliable recipe that keeps well and always tastes fresh.