Oven grill the BBQ eel for about 5 minutes
Mix ½ cup tempura mix and ½ cup cold water to make tempura batter
Dip shrimp in tempura
Deep fry until golden, leave to cool on paper towel
Cut a nori sheet in half, and cover with sushi rice
Flip the nori over, and place the shrimp and avocado across the nori
Roll it as you would an inside out sushi roll
Slice half an avocado in thin slices and place them on on the roll to fully cover it
Cover the roll with plastic tape. Use the sushi rolling mat to tighten the avocado to the roll.
Cut the roll through the plastic tape in 8 pieces. Remove the tape, and transfer the sushi to a serving plate. Decorate.