Gat Kimchi — Mustard Leaf Kimchi (갓김치)

Jeolla-do, South Korea — particularly Yeosu and Gwangyang-gun; the region's maritime climate and specific gat cultivar are inseparable from the dish's identity

Gat kimchi uses gat (갓, Brassica juncea var. integrifolia), the broad, dark-green mustard leaf grown extensively in Jeolla province, particularly around Yeosu and Gwangyang. The leaf's natural mustard compounds create a distinctive peppery bitterness that intensifies dramatically during fermentation, transforming into a complex, almost wasabi-like heat layered beneath the gochugaru. Yeosu gat kimchi is considered the benchmark; the maritime microclimate and specific variety grown there produce a distinctive mineral quality from the sea air. Fully fermented gat kimchi is one of Korea's most potent fermented side dishes.

• Parallels Japanese takana-zuke (pickled Japanese mustard greens, 高菜漬け) and Sichuan paocai using gai choi — all fermented Brassica juncea preparations that leverage the glucosinolate compounds

The aggressive pungency of gat kimchi pairs with fatty, rich proteins where it functions as a digestive enzyme — ganjang-gejang (soy-marinated crab), grilled eel, or oily mackerel. It is the kimchi that completes a Jeolla-style han-sang (전라도 한상), the most celebrated banchan tradition in Korea.