- Lay the bamboo sushi rolling mat on a cutting board with bamboo strips going horizontally from you. Cover the bamboo with plastic wrap. Put a sheet of dried seaweed on top of the mat, shiny side down. Spread sushi rice on top of the seaweed and press firmly.
- Sprinkle sesame seeds over the sushi rice. Turn the sushi layer over so that the seaweed is on top.
- Place cucumber, avocado and crab lengthwise on the seaweed. Roll the bamboo mat forward, pressing the ingredients inside the cylinder-shaped sushi. Press the bamboo mat firmly with hands, then remove the rolled sushi.
- With a VERY sharp knife, cut the sushi roll into pieces.