Quan An Ngon occupies a converted French colonial villa on Phan Boi Chau Street, its courtyard filled with individual food stalls each representing a different Vietnamese regional street food. The concept is a deliberate anthology: banh xeo from the south, bun bo Hue from central Vietnam, northern-style pho, central Vietnamese bun thit nuong, banh cuon from Hanoi — all made to order by individual cooks at their stations around the courtyard. It is more expensive than eating these dishes at their source, and less authentic than finding each one at a specialist street stall, but it is an efficient and enjoyable way to eat across Vietnamese regional cuisines in a single meal.
The villa setting is genuinely pleasant — trees overhead, ceiling fans, covered seating that stays cool even in Hanoi summers. It's popular with Vietnamese families, business lunchers, and tourists who've heard about it, which gives the clientele a reasonable mix. Go at lunchtime when everything is fresh and the kitchen is busy; evening service is fine but the daytime energy is better. Share dishes and order widely — the point is breadth rather than depth.