#23A, Ngo 158 Ngoc Ha
This place's a gem. Vietnamese run Japanese restaurant with a limited, but tasty menu, specialising in Jap pancakes (banh xeo nhat ban or okonomiyaki) for only 35,000 vnd each.
They also serve takoyaki (grilled octopus balls) 25,000 vnd for 5, kim-chi (20,000vnd) and noodles wrapped in omelet (45,000vnd).
Bia Hanoi is only 15,000 vnd and Sapporo is a bargain at 40,000 vnd a pop!
Here's a review with some mouth watering pics