Mash the lemon juice, avocado and shichimi togarashi into a coarse paste in a small bowl.
Lay 1 piece of salmon on top of each piece of seaweed. Divide the avocado mash evenly on top of the salmon. Then sprinkle each with soy sauce, crushed rice cracker and scallion. Fold in half like a taco and eat.
Shichimi togarashi is a Japanese blend of chiles and spices and can be found in Asian or specialty food stores.
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