Method Prep:15min › Extra time:1hr40min marinating › Ready in:1hr55min
In a glass or ceramic bowl, combine the white fish with the lime juice, orange juice, oil and chilli. Cover with cling film and chill in the fridge for 1 1/2 hours.
Add the spring onion and mango. Cover and chill a further 10 minutes.
Gently stir in the tomatoes and coriander. Season with salt and pepper to taste. Serve straightaway with tortilla chips and avocado, lime wedges and salt to garnish.