In a food processor puree the dill, parsley, oregano, lemon zest and juice, olive oil, ricotta cheese and yogurt. Transfer to a bowl and add the chives; season to taste with salt and pepper.
Drain the pasta, reserving 1/4 cup of cooking water and return it to the pot off heat. Add the herbed cheese mixture, reserved cooking water and toss. Serve immediately with slivered black olives.
Recipe Courtesy of �Michelle Urvater