For the mix: Place the tuna, celery, onion, corn and parsley in a bowl. Mix in the yoghurt dressing and season well. Feel free to add chilli flakes and rocket if you like.
370 g canned tuna, 3 celery sticks, 0.5 red onion, 125 g canned corn, 0.5 cup parsley leaves, 1 tbsp sweet chilli sauce, red chilli flakes, rocket leaves