Ceviche

Name: Ceviche
Prep time: 20 min
Total time: 20 min
Cuisine: Latin American
Ingredients: 500g firm white fish fillets, such as haddock, halibut or pollack, skinned and thinly sliced; juice 8 limes (250ml/9fl oz), plus extra wedges to serve; 1 red onion , sliced into rings; handful pitted green olives , finely chopped; 2-3 green chillies , finely chopped; 2-3 tomatoes , seeded and chopped into 2cm pieces; bunch coriander , roughly chopped; 2 tbsp extra-virgin olive oil; good pinch caster sugar; tortilla chips , to serve