A friend and I had lunch at Nha Trang (Second Avenue at Lake Merritt in Oakland) yesterday. It's a terrific place for lunch on a sunny day. There's a terrace on the side of a large old building which has a view of the lake - sailboats, joggers, birds. The space is large and shady and very quiet. It has the informal feel of beach cafes in Europe or Mexico - altogether an amazing escape on a workday.
A note on the food: the shrimp spring rolls were excellent, but the entrees (from the $4.95 lunch menu) were nothing out of the ordinary. Past notes on this board have suggested much better things, so it might be better to ask for the regular menu rather than the specials.