This pesto pasta salad is a fresh, summery dish that tosses curly noodles with vibrant basil pesto, juicy cherry tomatoes, creamy mozzarella, crunchy pine nuts, and peppery arugula. A squeeze of lemon brightens it, and whole basil leaves deepen the herbaceous flavor, making it ideal for potlucks, picnics, or a light weeknight dinner you can make ahead.
Ingredients you’ll need
A curly pasta shape holds the dressing best, catching pesto in its ridges and spirals. Reach for fusilli, cellentani, rotini, or cavatappi, then gather:
- Basil pesto, homemade or store-bought (about 1 cup)
- Cherry or grape tomatoes, ideally a mix of colors
- Fresh mozzarella balls, halved
- Arugula for peppery crunch
- Lemon juice, toasted pine nuts, and fresh basil leaves
- Salt and pepper to taste
Making homemade pesto
Fresh pesto is simple and worth the few extra minutes. Pulse pine nuts, garlic, lemon juice, salt, and pepper in a food processor, add fresh basil and pulse again, then drizzle in olive oil with the motor running until it comes together.
For this salad specifically, the recipe uses extra oil — about half a cup instead of a quarter — so the pesto stays loose and lightly creamy once it coats cold noodles. A stiffer pesto tends to clump on chilled pasta, so the looser ratio is the key tweak. For more warm-weather cooking, explore additional summer recipe ideas to round out the menu.
How to make pesto pasta salad
Cook the pasta in salted boiling water until just slightly past al dente, so it does not turn hard and chalky as it cools. Before draining, reserve three-quarters of a cup of the starchy cooking water — this is the step most people skip and later regret.
That reserved water is the secret to a silky result: stirred into the pesto, the starch helps it cling to the noodles as a rich, lightly creamy sauce rather than sliding off.
- Drain the pasta, toss with a little olive oil, and spread on a baking sheet to cool quickly and evenly.
- Combine the cooled pasta with pesto, lemon juice, salt, pepper, and half the reserved pasta water.
- Fold in tomatoes, mozzarella, and arugula, adding more pasta water as needed to loosen.
- Top with pine nuts, basil, and a pinch of red pepper flakes if you like a little heat.
Variations and storage
The recipe is flexible and easy to adapt to whatever is in the fridge:
- Use a mix of basil and another herb, or replace the basil with parsley or arugula.
- Swap walnuts or pepitas in for pine nuts as a more affordable option.
- Toss in thinly shaved raw zucchini or summer squash, bell peppers, or roasted eggplant.
- Fold in chickpeas for plant-based protein.
Stored in an airtight container, the salad keeps well in the fridge for up to three days. Because the flavors meld as it sits, it is a genuinely great make-ahead dish for potlucks and picnics, and the leftovers make a delicious next-day lunch.
Serving and make-ahead tips
Serve the salad at room temperature rather than fridge-cold, which lets the pesto and mozzarella taste their best. If you are transporting it, hold back a little reserved pasta water or a splash of olive oil and toss it through just before serving, since chilled pasta tends to drink up the dressing and tighten as it sits.
To prep ahead without sogginess, combine the pasta and pesto early but fold in the arugula and tomatoes closer to serving so the greens stay perky. It pairs naturally with other warm-weather favorites — browse more seasonal recipe stories to build a full picnic spread around it.
Frequently asked questions
Why reserve the pasta cooking water?
The starchy water helps the pesto coat the noodles into a rich, lightly creamy sauce instead of sliding off. Save about three-quarters of a cup before draining and add it gradually.
How long does pesto pasta salad keep?
Stored in an airtight container in the fridge, it keeps well for up to three days, which makes it ideal for making ahead of a picnic or potluck.
