-------------------------------MUSTARD PASTE-------------------------------
      4 ts Dry mustard

      2 ts Water

      1 ts Shoyu

---------------------------TOPPINGS (CHOOSE FROM---------------------------
           Sashimi (raw fish)
           Cooked shrimp
           Cooked octopus
           Caviar
           Sliced cucumber
           Etc.
       Make a paste out of mustard, water, and shoyu. Shape sushi rice
  into oblongs about 1" x 2 1/2"; flatten slightly. Pat mustard paste
  on rice; press desired topping on top. Dip in shoyu to eat.