Crunchy Asian Chicken Salad

Name: Crunchy Asian Chicken Salad
Ingredients: 1 1/2 cups finely diced cooked chicken meat (6 ounces, about 1 1/2 breast halves); 6 canned peeled water chestnuts, rinsed and chopped; 1 carrot, peeled and shredded; 1 small celery rib, finely diced; 1/2 cup diced apple, such as Gala or Golden Delicious (about 1/2 apple); 1 tablespoon natural peanut butter or sesame tahini; 1 tablespoon seasoned rice vinegar; 3/4 tablespoon soy sauce; 2 tablespoons mayonnaise; 1 tablespoon minced fresh chives (optional); 1/4 cup roasted soy nuts or coarsely chopped unsalted peanuts; 1 teaspoon hot sesame oil (optional)