Ingredients

• 3 cups diced cooked chicken
• 1 cup chopped celery
• 3/4 cup chopped onion
• 1 (8 ounce) can sliced water chestnuts, drained
• 1 1/2 cups shredded cheddar cheese
• 1 cup mayonnaise, use more if needed
• 1/2 cup reduced-fat sour cream
• 1/4 cup low-fat milk
• 1/2 teaspoon salt
• 1/2 teaspoon tarragon
• 1/4 teaspoon pepper
• 1/2 cup crushed buttery cracker
• 1 small apple, cored and diced