Korean Spicy Pickled Cabbage, also known as Baechu Kimchi, is a staple Korean side dish made with Napa cabbage, salt, chili pepper flakes, and various seasonings. It is a spicy and tangy kimchi that is fermented to develop its flavors. The cabbage becomes crunchy and slightly sour, while the chili pepper flakes add heat and depth. Korean Spicy Pickled Cabbage is commonly served as a side dish with rice and other Korean dishes.