With a sharp knife, cut Salmon into small cubed pieces. Chop scallion into fine pieces. Next, in a large mixing bowl, mix together the Salmon, Scallions, Soy Sauce, Sesame Seeds, Salt, Pepper and Garlic Powder.
Warm taco shell for about 5 minutes on a baking sheet in a 350 degree oven. (This step is optional)
In a warm shell, place a layer of shredded lettuce and coat with Sriracha May. Fill Taco shell with Salmon Tartare. Serve immediately.
Serve with extra Sriracha Mayo and/or Wasabi Sauce on the side.