I had yusheng as a side dish to a stellar fish porridge/congee in a Hawker Centre in Singapore early this year. Ever since I came back, I've tried to find it in LA but don't even know where to look since there are hardly any restaurants serving Singapore Chinese food here. Perhaps a version of yusheng can be found in other Chinese restaurants?
For those who don't know, yusheng is a raw fish salad where, at least in the Singapore version, strips of fish are tossed with a number of toasty, crunchy ingredients, with a squeeze of kalamansi juice on top (limau kasturi in Malay, I think).
Here's a picture of the Singapore yusheng I ate -