This is the easiest sushi dish you could ever make. I'd trust a half drunk hillbilly to make this as well as me in a heartbeat. You're gonna use cured Trout Roe... you already have some, right? Make sushi rice according to its directions and make a simple solution of rice vinegar, sugar, and salt. I generally use about a quarter cup of rice vinegar, tablespoon of sugar, big pinch of salt and a splash of water for this mixture, experiment till you find a mix you like, you can find many wild variations of this online, so google your heart out. Mix a bowl full of water, rice vinegar and pinch of salt. Maybe a cup of water and 3 tablespoons of vinegar, teaspoon of salt. This is for your hands while you handle the sushi rice. Cut 1 inch wide by 5 inch long strips of Nori. Make a small ball of rice and roll it into the piece of nori. Mine end up round, but an oval shape is idea, in fact "Gunkan" means "battleship" in Japanese, so think of that shape.