
Sun-dried freshwater clams are sold at a roadside stall in Thuong Phuoc Commune, Dong Thap Province, southern Vietnam. Photo: Dang Tuyet / Tuoi Tre
With hen (the clams) abundant in the rivers of the upstream provinces of An Giang and Dong Thap, locals began marinating them to preserve them for later consumption.
The simple preservation method eventually turned into a regional delicacy sought after by visitors from near and far.
In the Mekong Delta, hen are raked from large rivers or gathered by hand from smaller canals and streams when water levels recede.
Their meat is commonly used in soups, stir-fries, or braised dishes seasoned with lemongrass, chili, or black pepper.
In An Giang and Dong Thap, where fresh clams are plentiful, locals developed a distinctive way to enjoy them for longer.

Salt and chili are the two main seasonings used to prepare sun-dried freshwater clams. Photo: Dang Tuyet / Tuoi Tre
The clams are first soaked to expel sand, then thoroughly scrubbed to remove mud and grit from their shells.
They are later mixed with salt, chili, and each family's own blend of seasonings before being spread under the hot sun for several hours.

Freshwater clams are marinated before being dried under the sun. Photo: Dang Tuyet / Tuoi Tre
The key to the dish lies in 'reading the sun.'
If dried for too long, the clam meat becomes tough and loses its natural sweetness; if not exposed to enough sunlight, the clams spoil easily and are difficult to preserve.
After two to three hours under the sun, the clams are ready to eat and are commonly enjoyed as a snack or with steamed rice.
It is best consumed the same day or refrigerated and eaten within two to three days.

Freshwater clams coated in a glistening layer of salt and chili are left to dry under the hot sun. Photo: Dang Tuyet / Tuoi Tre
The dish offers a distinctive combination of flavors: the natural sweetness of the clam meat balanced by the gentle heat of chili and the moderate saltiness of the seasoning, creating a taste that is both unusual and memorable.
Sun-dried freshwater clams are commonly sold at roadside stalls in the Tan Chau area of An Giang Province and the Hong Ngu area of Dong Thap Province, where they have long been a favorite specialty among travelers passing through the region.
In recent years, social media has introduced the delicacy to a much wider audience.
Many vendors now announce in advance when a new batch will be ready and how much will be available.
Customers place orders online, and some batches sell out within just a few hours.

Sun-dried freshwater clams are sold for VND15,000 (US$0.57) per can in the Hong Ngu area of Dong Thap Province in southern Vietnam. Photo: Dang Tuyet / Tuoi Tre
The delicacy sells for VND120,000-160,000 (US$4.56-6.08) per kilogram, or VND12,000-15,000 ($0.46-0.57) per can, a common local unit of measurement.
Along the roads of the upper Mekong Delta, trays of bright red clams glistening in the sun often catch the eyes of passing travelers, tempting many to stop and sample the regional specialty.
Dang Tuyet - Dong Nguyen / Tuoi Tre News
Link nội dung: https://news.tuoitre.vn/sun-dried-spicy-freshwater-clams-vietnams-mekong-delta-delicacy-winning-fans-online-103260727163633777.htm