The river bridge area plays host to a large encampment of makeshift food stalls with a good variety of eats on offer. You can also head to the town market, up the hill to the west of the river, for street food. There's a pretty good sit-down place in the market, Tam Tam, that offers standard Vietnamese fare and is popular with locals.
Seafood lovers will want to pay a visit to Thanh Thuy on 23/3 St, east of the bridge on the north side of the street. It's a very popular place that offers fresh seafood hotpots, as well as lobster, crab, eel, mussels and clams steamed or grilled. Hotpots cost 40-70,000 depending on the size -- no English-language menu, but we tried a tasty hotpot called Ca Loc which is a local river fish.
Numerous cafes offer excellent local coffee all over town. You'll find a couple of bia hoi places at the intersection of Hung Vuong and Tran Hung Dao Sts near the bridge.
Tam Tam: Ly Thuong Kiet St, Gia Nghia. T: (050) 843 189. Hours: 10:00 to 20:00
Thanh Thuy: 79 23/3 St (east of the bridge), Gia Nghia. Hours: 07:00 to 24:00