1. Soak green onion julienne in cold water. In a heatproof bowl, stir together chopped green onions and coriander; cover with ginger, 1 tsp (5 ml) of the salt, chilies and white pepper. In a small saucepan heat oil with Szechuan peppercorns over medium heat until fragrant; add sesame oil and pour through a strainer over green onion mixture. Stir until well mixed; cool. Pour most of the oil from the surface of the relish and reserve.

2. Sprinkle fish with remaining salt and black pepper and grill or broil on both sides. For salmon darns, grill skinside first then flip and remove skin. (For trout, baste fish after turning with reserved oil and turn a second time to baste; ensure that skin is crispy.) When just cooked through, remove from grill. Cover each salmon piece with a line of the relish. (For trout, cut through skin with a sharp knife at the bottom of one side from the stomach opening to the tail; carefully peel back crispy skin in one piece and make a roll of it at the back of the fish; put a line of relish along the middle of the trout.) Garnish fish with coriander sprigs and well-drained green onion julienne.