Combine the first five ingredients in a mixing bowl.: As you start, you will notice the aroma of toasted almonds and the clean, faint scent of celery . Tossing the chopped chicken , diced celery , halved grapes , chopped toasted almonds , and drained mandarin oranges in a large bowl distributes textures evenly and prevents clumping. Use a gentle folding motion so the delicate fruit segments stay intact and the nuts remain distributed rather than sinking. The visual cue you want is a colorful mixture where every ingredient is visible, not buried. A common mistake is over mixing which pulverizes the oranges and makes the salad watery, so stop once everything looks evenly scattered.
In a smaller bowl, combine the mayonnaise, grated onion, and salt. Mix well.: When you whisk the dressing, inhale the faint sharpness from the grated onion which will mellow as it integrates. Whisking until smooth ensures the mayonnaise emulsifies with the onion and salt, creating a silky texture. The tiny grated bits of onion should dissolve visually into the dressing rather than sitting as chunks. If the dressing looks grainy, whisk a little longer; if it tastes flat, a tiny extra pinch of salt can help. Avoid adding more liquid as that will thin the dressing and change the creaminess.
Add the mayonnaise to the chicken mixture and gently stir to incorporate.: As you fold the dressing into the bowl, you will feel the mixture become glossy and cohesive, with a soft sheen from the mayonnaise . Stir slowly to coat each piece without smashing the fruit segments; the sound is a soft swish rather than a loud clatter. This step is where the salad’s balance takes shape, so taste as you go and look for a smooth, even coating. Over stirring can break the oranges and grapes, releasing juice and thinning the salad, so stop when the ingredients look unified and evenly dressed.
Spoon the chicken salad onto lettuce leaves to serve.: When plating, the crispness of the chosen lettuce will be immediately noticeable against the creamy filling. Use a spoon to portion into neat mounds on individual butter lettuce or romaine leaves, so each serving is attractive and easy to pick up. The contrast between glossy salad and fresh green leaves is pleasing to the eye, and the lettuce gives a refreshing crunch that brightens the bite. A common error is to assemble too early which can make the leaves soggy; assemble just before serving to keep them crisp.
