I tried a foreign dish that made me sick. Forgot the name.

[unfamiliarfood]

I was at this japanese restaurant and I tried this type of sushi that gave me food poisoning. I forgot the name of the dish but I really want to remember so I can warn my friends about it for future reference. What I remember about it was rice wrapped in seaweed and had a brown, mushy type of thing on top. All I know is, it had a foreign name and it’s a type of sushi that I ate at my local Jap restaurant. Am planning to confront them about it but I need to remember the name first though. Please help me!