Wikipedia
Pempek
Pempek, mpek-mpek or empek-empek is a savoury fishcake delicacy from Palembang, South Sumatera, Indonesia, made of fish and tapioca. Pempek is served with rich sweet and sour sauce called kuah cuka or kuah cuko (lit. vinegar sauce), or just "cuko". Sometimes local people also add yellow noodles for variations.