Chicken Walnut Summer Salad (Creamy & Light)

Name: Chicken Walnut Summer Salad (Creamy & Light)
Prep time: 10 min
Cook time: 30 min
Total time: 40 min
Cuisine: American
Ingredients: 2 medium boneless, skinless chicken breasts (about 1 lb / 450g total); 2 cups chicken broth (480ml, for poaching); 2 stalks celery (finely chopped); 1/4 cup onion (finely chopped, 40g); 1 cup red grapes (halved, 150g); 1 cup walnuts (roughly chopped, 120g); 1 cup mayonnaise (240g); 1/2 cup heavy whipping cream (120ml, whipped to soft peaks); 1 teaspoon white pepper (2g); 1 pinch salt (to taste)