Step 1

Prepare the pesto and set aside.

Step 2

Bring a large pot of salted water to a boil. Prepare the pasta according to the package directions, or until slightly past al dente. Before draining the pasta, scoop ¾ cup of the starchy pasta water and set aside. Drain the pasta and toss it with a little olive oil so that it doesn’t stick together. Spread the pasta on a baking sheet and let it (and the reserved pasta water) cool to room temperature.

Step 3

In a large bowl combine the pasta, zucchini, yellow squash, pesto, the reserved pasta water, lemon juice, salt, and pepper and toss. Season to taste. Top with the pine nuts, fresh basil, and red pepper flakes, if using. Serve the salad at room temperature.