Bún chả is served with grilled fatty pork (chả) over a plate of white rice noodle (bún) and herbs with a side dish of dipping sauce. The dish was described in 1959 by Vietnamese food writer Vu Bang (1913–1984) who described Hanoi as a town "transfixed by bún chả." Hanoi's first bún chả restaurant was on Gia Ngư, Hoàn Kiếm District, in Hanoi's Old Quarter.
Bún chả originated and remains very popular in Hanoi. Outside Hanoi, across all regions of Vietnam, a similar dish of rice vermicelli and grilled meat called bún thịt nướng is alternately served.
According to VietKings (Kyluc.vn)