CNN  —  The fact that there are more than 100 different types of kimchi should tell you something about the pride Koreans have in their food. Korean cuisine has evolved over time because of cultural changes, but it remains a major aspect of the national identity. Here are 40 dishes that are essential to the Korean heart, soul and digestive tract. Hangover stew (해장국) Given South Korea’s dedicated drinking culture , it’s not surprising that its hangover-curing culture is equally as developed,