It is cottage cheese with boiled potatoes. Milk products are a huge part of Latvian cuisine. Usually sour cream, a bit of salt and some dills or spring onions are added to the cottage cheese and it is enjoyed with boiled potatoes.
It means smoked fish. Since Latvia is situated by the Baltic Sea, fish dishes are typical to Latvian cuisine. Sprats, herring, flounder... You name it and Latvians can smoke it.