Drain the pineapple, reserving the juice. If in rings, chop into chunks. Mix with the chicken, onion, leaves, coriander and tomatoes, and divide between 2 containers if taking as lunch.
For the dressing, whisk 2 tbsp of the pineapple juice, the red chilli, vinegar and sweet chilli sauce with some seasoning in a small jam jar or lidded container, and toss this through the salad before serving.
