01 - Toast the pecan halves in a dry skillet over medium heat for 3 to 4 minutes, stirring frequently until fragrant. Allow to cool before use.
02 - In a large bowl, mix the diced chicken, chopped celery, halved grapes, sliced green onions, and cooled pecans until evenly distributed.
03 - Whisk together mayonnaise, Greek yogurt, Dijon mustard, lemon juice, salt, and black pepper in a small bowl until smooth.
04 - Pour the dressing over the chicken mixture and gently toss to ensure thorough coating of all ingredients.
05 - Taste the salad and adjust salt and pepper as needed to suit preference.
06 - Serve chilled atop mixed salad greens or lettuce leaves, or use as a filling for sandwiches and wraps.