Chicken Salad with Walnuts Recipe - Delicious and Nutritious

Ingredients

• 5 lb (2,400 g) skinless, boneless chicken breasts
• 0.75 cup (150 g) non- fat sour cream
• 0.75 cup (150 g) non- fat mayonnaise
• 2 tbsp (30 ml) white wine vinegar
• 4 celery ribs , strings removed, and cut into small dice
• 0.5 cup (75 g) walnuts
• 0.25 cup (12 g) chopped fresh tarragon
• freshly grated pepper
• extra tarragon for garnish