California roll

:  a type of sushi roll containing avocado, cucumber, and cooked crabmeat or imitation crabmeat with a wrapping of seaweed and rice The California roll, a stout roll of avocado, imitation crab (actually compressed pollock) and cucumber, was perhaps the first sushi variant to be developed in North America. It is believed to have originated in Los Angeles in the late 60's or early 70's … — Matt Lee et al., New York Times, 14 Aug. 2002