Prepare Sushi Rice:

Rinse the sushi rice under cold water until the water runs clear.

Combine the rice and water in a rice cooker or pot. Cook according to the rice cooker instructions or simmer on the stove until the water is absorbed (about 20 minutes). Let it cool slightly.

In a small saucepan, heat rice vinegar, sugar, and salt until dissolved. Gently fold this mixture into the rice. Let it cool to room temperature.

Prepare Fillings:

Slice fish and vegetables into thin strips or bite-sized pieces.

Set Up Rolling Station:

Place a bamboo sushi mat on a flat surface and cover it with plastic wrap. Lay a sheet of nori shiny side down on the mat.

Assemble Sushi Rolls:

Wet your fingers with the vinegar water to prevent sticking. Spread a thin, even layer of rice over the nori, leaving a 1-inch border at the top.

Arrange your desired fillings in a line across the center of the rice.

Using the bamboo mat, roll the sushi tightly, starting from the bottom edge. Use the border of nori to seal the roll.

Cut and Serve:

Use a sharp knife to cut the roll into even pieces, wiping the blade with a damp cloth between cuts.

Arrange the rolls on a platter and serve with soy sauce, wasabi, and pickled ginger.