3 cups rotisserie chicken, chopped and chilled 2/3 cup full-fat Greek yogurt 1 tablespoon Dijon mustard Juice of 1/2 lemon 1/3 cup green onion, chopped 3/4 cup seedless cucumber, peeled and chopped 1/2 cup celery, chopped 1/4 cup fresh parsley, chopped 1 teaspoon (dried) dill 1 teaspoon sea salt 1/4 teaspoon freshly ground black pepper…