Make Creamy Chicken Sandwich Easily - Cook with Carla

Ingredients

• 1 green onion stem, cut into thin slices
• 1 celery stalk, chopped into small pieces
• 500g shredded cooked chicken (from a large roasted chicken)
• 3 tbsp diced cornichons or dill pickles
• 75g chopped walnuts, roughly broken up
• 1 tbsp chopped fresh dill
• 2 tsp Dijon mustard
• 160g full-fat sour cream (or yogurt)
• 160g whole egg mayo
• ¼ tsp ground black pepper
• ¾ tsp kosher or coarse salt
• ½ tsp onion powder
• 1 tbsp fresh lemon juice or white wine vinegar
• ¼ tsp garlic powder
• 20 slices white sandwich bread (a bit stale is better)
• Butter with salt, for spreading