Yum Woon Sen, also known as glass noodle salad, is a light and healthy salad commonly found in Chiang Mai. It is made with transparent glass noodles, shrimp or chicken, lime juice, fish sauce, and a variety of fresh vegetables such as tomatoes, onions, and cilantro. The salad is often garnished with roasted peanuts for added crunch. Yum Woon Sen is a popular choice for those looking for a flavorful and satisfying salad in Chiang Mai.