Sushi

And now for some useless information. It is illegal to sell sushi in America unless it has been previously frozen. In the case of deep water fish it is not a terribly big deal, but in the case of Salmon not doing it is quite likely to give you parasites. You might expect it to be a huge quality issue, and it often is, however when cooled quickly to -70 using liquid nitrogen it is not something people can distinguish in blind taste tests.