Creamy Deli-Style Chicken with Tangy Sauce and Crunchy Veggies

Ingredients

• 500 g cooked chicken, finely shredded (e.g., rotisserie or poached)
• 1 celery stalk, finely diced
• 1 green onion, finely sliced
• ¾ cup walnuts, roughly chopped (optional)
• 3 tbsp finely chopped dill pickle or cornichon
• 1½ tbsp fresh dill, chopped (optional)
• ⅔ cup mayonnaise
• ⅔ cup sour cream or Greek yogurt
• 2 tsp Dijon mustard
• 1½ tbsp lemon juice or vinegar
• ½ tsp onion powder
• ¼ tsp garlic powder
• ¾ tsp salt (adjust to taste)
• ¼ tsp black pepper
• 10 slices soft sandwich bread, white or whole wheat
• Butter for spreading