Thai Pan-Fried Fish with Sweet & Sour Sauce

Ingredients :

1 pc sea-bass (about 500-600g) - cut into half
1 packet fresh corn (cut into half)
1 packet Kailan
4 pcs fresh red chillies (for garnishing)
500ml oil for deep-frying

Sweet & Sour Sauce :

1 tablespoon oil
1 teaspoon minced garlic
1 stalk lemongrass (sliced)
1 tablespoon dried shallots (for garnishing)
1 tablespoon fish sauce
1 tablespoon fresh shallots
4 tablespoons water
Coriander leave (for garnishing)
2 tablespoons tomato sauce
1 tablespoon chilli sauce