This fine accompaniment to any number of dishes is an (admittedly inauthentic) take on a Southeast Asian favorite, moderately spicy in Vietnam and far more fiery in Thailand. Choose chiles accordingly to match your preference: Thai chiles pack a lot of heat; serrano chiles are strong, but less so; red Fresno chiles have sweet undertones and are the mildest Also, try to get the best cucumbers you can, with thin skins The better the cucumber, the better the salad.