Peel and wash the potatoes, cut them into fine strips and put them in cold water. Leek onions clean, wash, cut into fine strips. Wash coriander, shake dry and pluck leaves from the stems. Wash fish, dab dry and possibly bone. Roast the cashew nuts in a pan without fat until golden brown, remove. Drain potatoes well. Heat 3 tablespoons of water with butter in a frying pan and steam the potato strips for about 5 minutes. Add spring onions and steam for another 5 minutes. Finally add cashew nuts and asia sauce, season with salt and pepper
Heat the oil in a frying pan. Cover the fish with coriander leaves, season with salt and pepper and fry carefully on each side for about 4 minutes, depending on size
Julienne potatoes, arrange fish fillet on plates, garnish with lime slices and chilli pepper