Trans-Siberian passengers have bought it through open train windows for generations — platform vendors at Baikal-side stations like Slyudyanka time their smoking racks to be ready exactly when the next train pulls in.
Omul is a whitefish found only in Lake Baikal, hot-smoked over alder or birch until the skin turns deep bronze and the flesh flakes apart with a rich, oily smokiness. Vendors sell it whole, still warm, from stalls along the lakeshore and on train platforms during Trans-Siberian stops.