Being a frequent visitor to Japan and its quality sushi and sashimi restaurants, as well as a consumer of sashimi in other locales, I've never had, nor seen oven-warmed fish served as a sashimi. Even the aburi preparation does not involve an oven, but a blow-torch or fire, not something we want to see in the galley of an airplane. It's either totally raw, aburi-prepared with usually one side having its surface cooked by fire, or pickled (i.e. mackerel), or it's just not sashimi - so United printing 'cod sashimi' on the menu either means the fish is served raw between slightly chilled and room temperature, or it's just not sashimi.

Personally, I would like to see a photo of this mystery dish if anyone dares to try it....or United can reprint the menu to call it what it probably is: "baked cod", which probably sounds less sexy than "sashimi". I've had sushi and sashimi on a flight, specifically ANA, but it's not something I would trust in the hands of a United crew, sorry.