Feta Garbanzo Bean Salad Recipe

1 can (15 ounces) garbanzo beans, rinsed and drained 1-1/2 cups coarsely chopped English cucumber (about 1/2 medium) 1 can (2-1/4 ounces) sliced ripe olives, drained 1 medium tomato, seeded and chopped 1/4 cup thinly sliced red onion 1/4 cup chopped fresh parsley 3 tablespoons olive oil 1 tablespoon lemon juice 1/4 teaspoon salt 1/8 teaspoon pepper 5 cups torn mixed salad greens 1/2 cup crumbled feta cheese