Prep the chicken: Pull leftover rotisserie chicken from the bones and chop or shred into bite-size pieces. Discard skin if you prefer a lighter salad.
Chop the veggies: Dice cucumber, halve tomatoes, slice red onion thin, and cut avocado just before mixing to keep it fresh.
Make the dressing: In a small bowl, whisk olive oil, lemon juice, Dijon, honey, grated garlic, yogurt or mayo, salt, pepper, and red pepper flakes until smooth.
Toss the base: In a large bowl, combine chicken, cucumber, tomatoes, onion, corn, and herbs. Pour over half the dressing and toss gently.
Add creamy and crunchy: Fold in avocado, greens, nuts or seeds, and feta.
Add more dressing as needed so everything is lightly coated, not soggy.
Taste and adjust: Add a pinch more salt, a squeeze of lemon, or extra herbs if it needs a lift.
Serve your way: Spoon into lettuce cups, pile onto warm flatbreads, toss with pasta, or heap onto toast. Finish with a drizzle of olive oil and a crack of pepper.