Prepare the vegetables and bamboo mat. Slice the cucumber and avocado into thin sticks with a sharp knife. Set aside. Then wrap your bamboo sushi mat in plastic wrap.
Add the rice to the nori. Place a sheet of toasted nori seaweed on top of the sushi mat and cut off 1/4 of it with scissors. Then wet your hands in a bowl of water and grab a handful of sushi rice and gently spread a thin even layer on top of the seaweed.
Add the sesame seeds. Now sprinkle the toasted white sesame seeds and black sesame seeds on top of the rice. Then flip the entire sheet of seaweed over.
Add the fillings. Now, in the middle of the seaweed, add some imitation crab meat mixture, cucumber, avocado, and shrimp tempura.
Roll and cut the Dynamite Roll. While turning in the front of the nori with the sushi mat, slightly compress the filling. Keep rolling the sushi with the sushi mat, making sure to keep the roll tight.
Then use a sharp wet knife to cut the sushi into 8 equal pieces. Top with spicy mayo and unagi sauce, and serve with soy sauce and wasabi.