How to Make It
Stir together vinegar, sugar, and salt in a small bowl until dissolved.
Thoroughly rinse rice with running water; cook according to package directions. Spread rice in a large glass baking dish; drizzle with vinegar mixture, and gently fold in to incorporate.
Form rice mixture into 16 (3- x 1-inch) pieces; top with salmon slices and wasabi to taste. Serve with soy sauce.