Masala fried fish in sweet and sour sauce

An explosion of exotic seafood flavoursINGREDIENTS1 x 600g whole fish, gutted, scaled and trimmed5ml (1 tsp) chilli powder5ml (1 tsp) ground turmericJuice of 1 lemonOil, for fryingSAUCE15ml (1 tbsp) oil1 large onion, finely diced1 red pepper, seeded and diced3 cloves garlic, chopped10ml (2 tsp) ground coriander2 red chillies, seeded and diced10ml (2 tsp) mustard sauce30ml (2 tbsp) tomato sauce15ml (1 tbsp) brown sugar15ml (1 tbsp) cornflour125ml (½ cup) waterJuice of half a lemonSalt and pepper1...