Start the rice the day before or first thing in the morning – it needs minimum 4 hours to chill.
Make the toppings first, then refrigerate while you cook the crispy rice cakes.
Cook the crispy rice cakes and sprinkle with salt per the recipe.
Assemble – Place rice cakes on a serving platter. Pile on toppings – I use teaspoons to make football shapes then slide on. Sprinkle with black sesame seeds, top with jalapeño. Eat!
Nobu Spicy Tuna Topping
Freeze to firm – Place tuna in the freezer for 30 minutes to partially freeze – it's much easier to finely chop when slightly firm.
Cut into 0.5cm / ½" cubes – the smaller the better! Place into a bowl and let it de-chill for 20 minutes (not as nice ice-cold).
Mix – Add everything into the tuna and mix until combined.
Creamy Canned Tuna Filling
Place tuna in a bowl and use a fork to mash it up really finely. Add everything else and mix well.
Notes
Makes 15 pieces 4 x 6.5cm/ 1.5 x 2.5″ (crispy rice dimensions).