**Toast the Walnuts**: Heat a wide, non-stick pan over low heat. Place 0.5 cup of walnut halves into the pan and toast for
3-4 minutes, stirring constantly, until they turn slightly in color and release their characteristic aroma. Be careful not to burn the walnuts, as they may become bitter. Transfer the toasted walnuts to a separate plate and let them cool completely before adding to the salad; this process will add a warm, slightly woody aroma and a pleasant crunch to your salad.