Introduction to Isan Food Isan is the Northeast region of Thailand so when talking about Isan food is one of the most widely eaten variations. Isan food has a unique characteristic that all dishes mostly consist of herbs, spices, fermented ingredients as well as many selections of protein. Across Thailand you can find Isan food every corners. Som Tum (papaya salad) is the most renowned dish of the region, but there are so many more mouthwatering Isan dishes for you to experiencing it.