Clean the fish fillets, drizzle with lemon juice and lightly salt. Fry on both sides in hot peanut oil, keep warm on a plate.
Steam the spring onions and garlic in the roasting dish with another dash of peanut oil until soft. Season with soy sauce, black pepper, fish sauce and a pinch of brown sugar. Simmer gently for a few minutes.
Pour the hot, seasoned sauce over the fish fillets. Top with chilli cubes, sprinkle with the coriander greens and basil.
Glass, rice or Thai fried wheat noodles are enough.