In a flat surface, place the nori sheet.
Add a generous amount of the sushi rice to make a square shape the same size as the tofu katsu.
Add the lettuce and then the tofu.
Add other toppings of choice, all the same size as the tofu and rice.
Add another layer of rice and press down.
Fold each side of the nori sheet to the center while holding together the filling to ensure the sandwich will be held together well.
Fold the sheet up while tucking in the sides.
Flip over then slice with a sharp knife. Feel free to add some sesame seeds and teriyaki sauce to your liking! If you intend to store these in the refrigerator, you can wrap them in some cling wrap or place them in an air tight container to avoid them drying out.