Rainbow Roll
from http://www.sushiencyclopedia.com/

The rainbow roll is a California roll with sashimi and avocado wrapped around it. The outside roll is first made, and then the ingredients are arranged diagonally in alternating colors.
Halibut, Red Snapper, or Sea Bass
Tuna
Salmon
Yellowtail
Avocado
California Roll
Nori
Wasabi
Place the sashimi on the California roll at a slight angle. Leave some space open for avocado.
Peel an avocado, then thinly peel the outer meat, which is greener than the rest of the fruit. Fill in the gaps with the avocado and cover the roll with plastic wrap.
Cover with a sushi mat and grip tightly. Cut into 8 pieces.
Serve with pickled ginger, wasabi and soy sauce. See How to Eat Sushi.