Step 1

Cook orzo according to package directions; drain and rinse with cold water until pasta feels cool to the touch.

Step 2

While pasta cooks, stir together pesto, oil, lemon zest, and lemon juice in a large bowl.

Step 3

Add pasta, beans, tomatoes, spinach, cucumber, salt, and 1/2 cup of the feta to pesto mixture; stir to combine. Let stand 10 minutes. Sprinkle with pistachios and remaining 1/2 cup feta. Serve.