Vu Dai's Braised Fish: The Clay-Pot Tradition That Takes All Night

Ha Nam province doesn't get many visitors, and that suits the cooks of Lang Vu Dai just fine. For centuries, this small village near Ly Nhan district has been doing one thing obsessively well — slow-braising fish in clay pots until the bones go completely soft, producing a dish that has no real equivalent elsewhere in northern Vietnam (베트남 / 越南 / ベトナム).

What "Ca Kho" Actually Means Here

"Ca kho" — braised fish in a clay pot — exists all over Vietnam, but what comes out of Vu Dai is a different beast. Most ca kho you'll find at a Hanoi com binh dan stall cooks for an hour or two and leaves the bones intact. The Vu Dai version goes for twelve to sixteen hours minimum, sometimes longer, over a slow burn of rice husks and sawdust that maintains an even, low heat no gas burner can replicate. By the time it's done, you can eat every part of the fish — spine, rib bones, tail — without a second thought. The flesh itself collapses into the braising liquid: fish sauce, caramelized sugar, galangal, chili, sometimes a pour of rice wine.

The fish used is "ca tram" (grass carp), typically pulled from the ponds that dot the Red River Delta flatlands. Carp from this region tend to be large — two to three kilograms — and the flesh is dense enough to hold up through the long cook without turning to mush.

The Overnight Process

The clay pots are short and wide, sealed with banana leaf before the lid goes on to trap steam during the early hours. Cooks start in the evening, banking the husk fire low, and check through the night. By morning the liquid has reduced to a thick, almost lacquered glaze — dark reddish-brown, intensely savory, slightly sweet from the caramel. The smell is unmistakable: a deep, smoky-fishy-sweet thing that hangs in the air across the whole village on production days.

This is not a dish that scales well to restaurant kitchens. The clay pot, the husk fire, the overnight timing — none of it works on a commercial range. Which is why Vu Dai essentially functions as a cottage industry: family operations that take pre-orders, produce in batches, and pack finished pots for shipping or pickup.

When It Became Famous Beyond Ha Nam

For most of its history, ca kho lang Vu Dai was a hyper-local thing — eaten at home, given as gifts between villages, brought to Hanoi (하노이 / 河内 / ハノイ) by relatives. That changed in the 1990s as transport improved and Hanoi's appetite for regional specialties grew. By the 2000s, village producers were shipping sealed clay pots north by the hundreds in the weeks leading up to Tet. The dish became firmly associated with the Lunar New Year — a pot of Vu Dai fish on the table signals effort and tradition in a way that a supermarket protein simply doesn't.

Demand spikes sharply in the month before Tet (뗏 (베트남 설날) / 越南春节 / テト (ベトナム旧正月)), when some households order pots weeks in advance. Outside that window, production continues year-round but at a smaller scale.

Photo by Vietnam Tri Duong Photographer on Pexels

Where to Order

You have two practical options.

Go to the village directly. Lang Vu Dai sits in Hoa Hau commune, Ly Nhan district, about 55 km south of Hanoi — roughly 90 minutes by motorbike via National Route 1A and then provincial roads toward Ly Nhan town. Several family workshops operate openly and will sell direct. Prices run 150,000–250,000 VND per clay pot depending on fish size and weight. A few well-known names in the village include the Ba Them and Nam Can operations, which have been running for multiple generations. You'll smell your way to the active ones.

Order online or from Hanoi distributors. Most of the larger Vu Dai producers now take orders via Zalo and ship via overnight logistics. Hanoi wet markets — particularly Dong Xuan Market in the Old Quarter — often carry sealed pots from established village suppliers, especially in the two months before Tet. Prices in Hanoi are typically 200,000–350,000 VND per pot after transport markup.

How to Eat It

The standard serve is simple: a pot of ca kho Vu Dai alongside plain white rice, some quick-pickled vegetables (cu cai or dua mon), and maybe a bowl of clear broth to cut the richness. The braising liquid is the point — dense, salty-sweet, slightly caramelized — and you spoon it over rice until the bowl looks almost black. A clay pot that size feeds two to three people comfortably as part of a larger spread, or two people who are serious about it.

It keeps well unsealed in the refrigerator for five to seven days, and the flavor arguably deepens on day two and three as the glaze tightens further.

Photo by Vietnam Tri Duong Photographer on Pexels

Getting There from Hanoi

The most straightforward route is motorbike: Giai Phong south to National Route 1A, continue toward Phu Ly city, then follow signs toward Ly Nhan. From Phu Ly it's another 20 km east along the river. Phu Ly itself is worth a brief stop — the city sits where the Day River and Nhue River converge, and Ha Nam's own local food scene (including "banh cuon" stuffed with wood-ear mushroom and pork, distinct from the Hanoi version) is worth a meal before the drive back.

Public bus from Hanoi's Giap Bat station reaches Phu Ly in about 90 minutes for around 60,000 VND; from there you'll need a xe om or taxi for the Ly Nhan leg.

Practical Notes

If you're visiting specifically to buy, call ahead — production is batch-based and you don't want to arrive on a day when the pots are already allocated. The village is easiest to visit October through February, when the weather is dry and producers are running at full capacity ahead of Tet. Sealed clay pots travel well in a backpack if you're continuing south toward Ninh Binh (닌빈 / 宁平 / ニンビン) or elsewhere; they won't leak if kept upright.