In a large bowl, combine chicken, celery, onions, and bell peppers.
In another bowl, whisk together olive oil, garlic, vinegar, broth, and Cajun seasoning. Pour the dressing over the chicken and vegetables and toss well to coat.
Cover bowl and refrigerate for 30 minutes. Stir a couple of times during the chilling process.
Much of the excess dressing will be absorbed by the other ingredients in the salad. Serve on its own or on lettuce leaves.
Easily double or triple the ingredients as needed.
For this recipe, you can use a store-bought rotisserie chicken, leftover shredded chicken or cooked chicken breasts. If you have shredded chicken, you'll want to chop it up a bit into smaller pieces (unless you want a shredded chicken salad which also works), for cooked chicken breasts, you can cube it instead.
You can adjust the spice level by using more or less cajun seasoning or by using a sweet cajun seasoning instead. It never hurts to taste test as you go to suit your preferred heat level!