Toast the Walnuts – For extra flavor, toast walnuts in a dry skillet over medium heat for 2-3 minutes, stirring often. Let them cool.
Make the Dressing – In a large bowl, whisk together mayonnaise, Greek yogurt, lemon juice, salt, and pepper.
Combine Ingredients – Add chicken, celery, green onions, dried apricots, and toasted walnuts to the dressing. Toss gently until everything is coated.
Serve – Spoon onto bread, rolls, or lettuce leaves.