Rinse the corn and tuna and drain in a sieve. Pluck the tuna. Clean, wash and cut the salad into fine strips. Halve avocado, remove core and peel the flesh. Dice avocado finely. Clean the chilli, cut lengthwise, wash and remove the seeds. Cut the pod into small pieces
Mix all prepared ingredients. Whisk vinegar, salt, pepper and sugar together, fold in oil in a thin stream. Marinate salad with it
For the yoghurt dressing, mix yoghurt with Tabasco, lime zest and juice. Season to taste with salt and pepper. Spread the salad in the tacoshells and drizzle with yoghurt dressing. Garnish with chilli and lime wedges