One of my favorite ways to enjoy bright, vegetable-forward meals is to reinvent classic flavor profiles with seasonal produce. This Spaghetti Squash Puttanesca takes the briny, tangy character of a traditional puttanesca sauce and pairs it with a roasted spaghetti squash base and a medley of colorful vegetables. The result is vibrant, satisfying, and perfect for weeknights when you want something that looks like you put in effort but actually comes together without fuss. Every bite combines tender squash strands with juicy grape tomatoes, bell pepper sweetness, and just the right garlic-and-Italian-herb lift.

Why this version works

Typical puttanesca centers on olives, capers, tomatoes, and anchovies for depth. In this version, we focus on making those bright, assertive flavors play beautifully with roasted spaghetti squash and a rainbow of vegetables. The squash provides a tender, noodle-like base that soaks up the sauce without overpowering it. The combination of garlic, Italian seasoning blend, and a touch of kosher or sea salt helps unify the dish, while olive oil brings everything together with gloss and mouthfeel. The vegetables—zucchini, yellow squash, bell pepper, broccoli, sweet onion, and baby spinach—add texture and color, making this dish feel hearty and wholesome.

Ingredients

1 spaghetti squash, large
1 sweet onion, large, 1/2″ dice
2 red bell peppers, seeded, veins removed, 1/2″ dice
1 pint grape tomatoes, halved
1 zucchini squash, large, 1/2″ dice
1 yellow squash, large, 1/2″ dice
2 cups broccoli florets, cut into bite-sized pieces
2 teaspoons granulated garlic
1 tablespoon Italian seasoning blend
1/2 teaspoon kosher salt or sea salt
2 tablespoons olive oil
2 cups baby spinach, roughly chopped

Equipment needed

Baking sheet
Sharp chef’s knife and cutting board
Large skillet or sauté pan
Mixing bowl
Fork for shredding spaghetti squash
Measuring spoons

Prep and cooking time

Active time: about 30 minutes
Roasting time: 35–45 minutes (depending on squash size)
Total time: about 75 minutes

Flavor and serving suggestions

This Spaghetti Squash Puttanesca shines hot from the stove but is also delicious at room temperature, making it a great option for lunches or potlucks. Finish with a shower of freshly chopped parsley or basil if you like fresh herbs. A squeeze of lemon brightens the flavors further, and a scattering of sliced olives or a few capers can be added for extra briny pop if you enjoy those notes. Serve with crusty bread or a simple green salad to round out the meal.

Step-by-step directions

Below are clear, ordered steps to prepare this dish. The directions follow the sequence of preparing the squash, roasting it, and then building a flavorful vegetable-based puttanesca-style sauce to toss with the squash strands.

Preheat the oven: Set your oven to 400°F (200°C) so it will be hot when the squash is ready for roasting.
Prepare the spaghetti squash: Carefully halve the large spaghetti squash lengthwise. Use a spoon to scoop out the seeds and stringy interior. Place the two halves cut-side down on a baking sheet. Roast in the preheated oven for 35–45 minutes, or until the flesh is tender and easily strands with a fork. Cooking time will depend on the exact size of your squash; begin checking at 35 minutes.
While the squash roasts, chop the vegetables: Dice the sweet onion into 1/2″ pieces, dice both red bell peppers into 1/2″ pieces after removing seeds and veins, halve the pint of grape tomatoes, and cut the zucchini and yellow squash into 1/2″ dice. Trim the broccoli into bite-sized florets and roughly chop the baby spinach.
Warm the skillet and oil: Place a large skillet or sauté pan over medium heat and add 2 tablespoons olive oil. Allow the oil to warm for about 30 seconds but not to the point of smoking.
Sauté the onion and bell pepper: Add the 1/2″ diced sweet onion and the 1/2″ diced red bell peppers to the skillet. Cook, stirring occasionally, for about 5–7 minutes or until the onion is translucent and the peppers begin to soften.
Add zucchini, yellow squash, and broccoli: Add the 1/2″ diced zucchini, 1/2″ diced yellow squash, and 2 cups broccoli florets to the pan with the onion and peppers. Continue to sauté for another 5–7 minutes, stirring occasionally, until the vegetables begin to soften but still retain some bite.
Season the vegetables: Sprinkle 2 teaspoons granulated garlic, 1 tablespoon Italian seasoning blend, and 1/2 teaspoon kosher salt or sea salt evenly over the vegetables. Stir thoroughly so the seasonings coat everything and cook together for 1–2 minutes to bloom the dried herbs and garlic in the warm oil.
Add grape tomatoes and spinach: Stir in the halved pint of grape tomatoes and the roughly chopped 2 cups baby spinach. Cook for 2–3 minutes until the tomatoes start to soften and the spinach wilts into the mixture, creating a loose, saucy texture.
Shred the roasted spaghetti squash: When the spaghetti squash is tender, remove it from the oven and let it cool for a few minutes until you can handle it. Using a fork, gently scrape the flesh to create spaghetti-like strands. Transfer the strands to a mixing bowl or directly into the skillet with the vegetables.
Toss the squash with the vegetable puttanesca-style sauce: Combine the roasted spaghetti squash strands with the vegetable mixture in the skillet or mixing bowl. Toss gently to ensure the squash is evenly coated with the tomatoes, seasoned vegetables, and olive oil. If using a separate bowl, return everything to the skillet over low heat for 1–2 minutes to meld the flavors.
Adjust seasoning and finish: Taste the combined dish and adjust seasoning if needed—add a pinch more kosher salt or a drizzle of olive oil if desired. If you like a brighter finish, a small squeeze of lemon juice is lovely here.
Serve: Plate the Spaghetti Squash Puttanesca warm. Garnish with freshly chopped herbs if you like, and enjoy immediately.

Notes and tips

Roasting the squash: For an even quicker roast, you can microwave the halved squash cut-side down on a microwave-safe plate for 6–8 minutes before transferring to the oven to finish, but roasting only in the oven gives better caramelization and texture.
Vegetable sizes: Keeping the dice roughly the same size helps the vegetables cook evenly. The 1/2″ dice specified in the ingredient list yields a pleasing bite.
Make-ahead: The vegetable mixture can be prepared up to a day ahead and gently reheated. The squash is best shredded just before serving so it retains its noodle-like texture.
Olives and capers: If you enjoy a more traditional puttanesca tang, try adding sliced olives or a teaspoon or two of capers when you add the tomatoes. They will boost the briny, savory character.
Protein additions: If you want to add extra protein, chickpeas or firm white beans stirred in at the end work well with these flavors.

Nutrition snapshot

This vegetable-forward dish is naturally rich in fiber, vitamins from the mixed squash and broccoli, and heart-healthy fat from olive oil. It’s a balanced, lighter take on classic puttanesca-style flavors without sacrificing the bold, savory notes that make the original so satisfying.

Final thoughts

Simple swaps and a little creativity can transform a classic into something new and exciting. This Spaghetti Squash Puttanesca keeps the spirit of that beloved sauce—tangy tomatoes, garlic, and herbs—while spotlighting roasted squash and a colorful mix of vegetables. It’s a dish that feels elevated but is easy enough for a weeknight, and it looks beautiful on the plate. Give it a try and enjoy how the textures and flavors come together into a comforting, bright meal.

Spaghetti Squash Puttanesca

A light, vegetable-forward puttanesca using roasted spaghetti squash and a medley of roasted summer vegetables tossed with spinach.

Print Recipe Pin Recipe

Prep Time 15

Cook Time 40

Total Time 55

Servings: 6 people

Ingredients Equipment Method Notes

Ingredients

1 spaghetti squash large
1 sweet onion large, 1/2" dice
2 red bell peppers seeded and ribs removed, 1/2" dice
1 pint grape tomatoes halved
1 zucchini squash large, 1/2" dice
1 yellow squash large, 1/2" dice
2 cups broccoli florets cut into bite-sized pieces
2 teaspoons granulated garlic
1 tablespoon Italian seasoning blend
1/2 teaspoon kosher salt or sea salt
2 tablespoons olive oil
2 cups baby spinach roughly chopped

Equipment

Chef’s knife
Cutting Board
Sheet Pan
Fork
Large mixing bowl
Measuring Spoons

Method

Preheat the oven to 400°F (200°C).
Halve the spaghetti squash lengthwise and scoop out the seeds; place each half cut-side down on a sheet pan and roast until tender, about 20–25 minutes.
While the squash roasts, spread the diced onion, diced red peppers, halved grape tomatoes, diced zucchini, diced yellow squash, and broccoli florets on a second sheet pan.
Sprinkle the vegetables with granulated garlic, Italian seasoning, and salt, drizzle with olive oil, and toss to coat evenly.
Roast the vegetables in the 400°F oven for about 15–20 minutes, until tender-crisp and lightly browned; remove from the oven.
Let the spaghetti squash cool slightly, then use a fork to shred the flesh into strands and transfer them to a large mixing bowl or casserole dish.
While the squash is still warm, add the roughly chopped baby spinach and the roasted vegetables to the bowl with the shredded squash.
Toss everything together until combined, taste and adjust seasoning if needed, and serve warm.