Steam broccoli, covered, for 2 minutes or until crisp-tender. Rinse broccoli with cold water. Drain; place in a large bowl.
Drop the pine nuts and garlic through food chute with food processor on, and process until minced. Add parsley, mint, and cheese; process until finely minced. With the processor on, slowly pour the oil, lemon juice, water, salt, and pepper through food chute, and process until well blended.
Add the parsley mixture, orzo, and chicken to broccoli; stir well.