Causa de cangrejo in South OC?
Caught a Bourdain Peru ep where they were eating this dish made of eggs, potatoes, and fish (crabmeat I think). Looked really interesting . Any idea where they might serve it in OC (south preferred!).
El Rocoto in Cerritos http://www.elrocoto.com/ has "causitas" on their menu, which appear to be what you are looking for (or at least they have their version of the dish). Casa Inka http://www.casainkarestaurant.com/ in Fountain Valley also has it on their menu.
Mo-Chica http://mo-chica.com/ has a version of it on their menu. Not OC but if you are ever up this way you can see what you think of it. Also up this way, Picca http://www.piccaperu.com/ has a whole menu section that they term their "Causa" bar and has various toppings offered.
I don't think it was on the menu, but you can check with Delicias Peruanas in Lake Forest if they can make it. The owners are actual Peruvian of Asian descent and speak fluent Spanish.