It was invented by Koreans exiled from the Far East to Central Asia in 1937, who improvised a kimchi-style pickle using carrots because napa cabbage wasn't available — carrot ended up eclipsing cabbage across the whole former Soviet Union.
Morkovcha is julienned carrot tossed with garlic, ground coriander, chili, vinegar, and hot oil, left to marinate until it turns soft and deeply seasoned. Market stalls across Russia's Far East sell it by the scoop from open tubs, alongside pickles and other prepared salads.