“One of the key words to understanding traditional Korean food is fermentation, a metabolic process that helps food to “mature” so that it can be stored for a longer period. The Korean foods that best represent the tradition of fermentation developed in Korea include doenjang (soybean paste), ganjang (soy sauce), gochujang (chili paste), and jeotgal (fermented fish sauce). The fermentation can take anywhere from several months to several years.”