Dry the washed fillet well, shape it in the form of a steak or schnitzel, lightly hammer it with a wooden mallet, dipped in cold water. Sprinkle with salt and pepper.
Soak with the oil and some lemon juice. Bake in a moderate oven or on the grill. Pour a sauce made from the finely chopped nuts, garlic rubbed with salt, black pepper and coriander - finely chopped, the parsley and spearmint, lemon juice and oil over the fish.