Chipotle prawn tacos

Name: Chipotle prawn tacos
Ingredients: ½ pointed green cabbage, shredded; 200g/7oz carrot, grated; ½ tsp salt; 1 habanero or jalapeno chilli, very finely chopped (see recipe tip); 150ml/5fl oz soured cream; 1 tsp onion powder; 1 tsp garlic powder; 1 tsp dried oregano; 1 tbsp cider vinegar; salt and freshly ground pepper; 1 tbsp ancho chilli paste; 1 tbsp olive oil; 2 tsp chipotle paste; 1 tsp cocoa powder; 1 tsp light brown soft sugar; 1 lime, zest and juice; 500g/1lb 2oz raw peeled prawns; butter or ghee for frying; 1 large mango, peeled and finely chopped; 1 red onion, finely chopped; few springs coriander, finely chopped; 16 mini flour tortilla wraps; 1 lime, cut into wedges