Chicken breast (cooked, diced): 85g (3 oz), Greek yogurt (plain, low-fat): 60g (1/4 cup), Celery: 30g (1 stalk, diced), Red grapes: 40g (1/4 cup, halved), Walnuts: 15g (1 tbsp, chopped), Green onions: 10g (1 tbsp, chopped), Whole grain bread: 60g (2 slices), Mixed greens: 30g (1 cup), Lemon juice: 5ml (1 tsp), Dijon mustard: 5g (1 tsp), Black pepper: to taste